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News articles on animal behavior
Mongabay.com news articles on animal behavior in blog format. Updated regularly.
(07/25/2014) Turtles comprise one of the oldest living groups of reptiles, with hundreds of species found throughout the world. Many have been well-researched, and scientists know very specific things about their various evolutionary histories, metabolic rates, and the ways in which their sexes are determined. But there was one very obvious thing that has been largely left unknown by science until very recently. Turtles can make sounds.
Monkeys use field scientists as human shields against predators
(07/22/2014) If you're monkey—say a samango monkey in South Africa—probably the last thing you want is to be torn apart and eaten by a leopard or a caracal. In fact, you probably spend a lot of time and energy working to avoid such a grisly fate. Well, now there's a simpler way: just stick close to human researchers.
Horror movie bugs: new wasp species builds nest with the bodies of dead ants
(07/02/2014) If ants made horror movies this is probably what it would look like: mounds of murdered ants sealed up in a cell. The villain of the piece—at least from the perspective of the ants—is a new species of spider wasp, which scientists have aptly dubbed the bone-house wasp (Deuteragenia ossarium) in a paper released today in PLOS ONE.
Chinese fishermen get the ultimate phone video: a swimming tiger
(06/19/2014) Two Chinese fishermen got the catch of their lives...on mobile phone this week. While fishing in the Ussuri River, which acts as a border between Russia and China, the fishermen were approached by a swimming Siberian tiger. These tigers, also known as Amur tigers, are down to around 350-500 animals.
Culling elephants leaves an impact on their social structure decades later
(05/30/2014) Researchers from the University of Sussex studied and compared the social behavior of two elephant herds: one that was severely affected by 1970 and 1980 culling operations and a herd that was relatively unaffected. In their results, the researchers found that the elephant herds that had experienced culling operations exhibited signs of post traumatic stress disorder.
Zebras for the win! Africa's longest land migration discovered
(05/29/2014) With food and water scarce in many parts of Africa, many species migrate long-distances in order to survive. A new study published in the journal, Oryx has found a new record-breaker for the continent’s longest tracked terrestrial migration: a huge group of zebras that traveled a total distance of 500 kilometers (300 miles).
Olinguito, tinkerbell, and a dragon: meet the top 10 new species of 2013
(05/22/2014) Out of around 18,000 new species described and named last year, scientists have highlighted ten in an effort to raise awareness about the imperiled biodiversity around us. Each species—from a teddy-bear-like carnivore in the Andes to a microbe that survives clean rooms where spaceships are built—stands out from the crowd for one reason or another.
Hope in the Heart of Darkness: huge population of chimpanzees discovered in the DRC
(05/20/2014) A recent study describes a new population of chimpanzees, which forms a continuous cultural group inhabiting an area of at least 50,000 square kilometers (19,000 square miles). The population, estimated to consist of many thousands of individuals, shares a unique set of learned skills that are passed on from generation to generation.
Camera trap catches rare feline attempting to tackle armored prey (VIDEO)
(05/19/2014) One of the world's least known wild cats may have taken on more than it could handle in a recent video released by the Gashaka Biodiversity Project from Nigeria's biggest national park, Gashaka Gumti.
Underwater horrors: shells of marine life melting off the coast of the U.S.
(05/08/2014) It could be the plot of a horror movie: humans wake up one day to discover that chemical changes in the atmosphere are dissolving away parts of their bodies. But for small marine life known as sea butterflies, or pteropods, this is what's happening off the West Cost of the U.S. Increased carbon in the ocean is melting away shells of sea butterflies.
Not unique to humans: marmoset shows compassion for dying mate (VIDEO)
(05/07/2014) For the first time, researchers have observed an adult marmoset comforting a dying adult family member, behavior that was previously thought to be unique only to humans and chimpanzees. Researchers observed this behavior between a mated pair of common marmosets (Callithrix jacchus) in Brazil, and describe the event in a paper and video published in the journal Primates.
When the orangutan and the slow loris met - and no one was eaten
(05/05/2014) In 2004 and 2012, scientists recorded rare encounters between two very different primates: southern Bornean orangutans (Pongo pygmaeus wurmbii) and Philippine slow loris (Nycticebus menagensis). But in neither case did the Bornean orangutan appear to attempt to kill the slow loris for consumption, which Sumatran orangutans are known to do, albeit very rarely.
The Harry Potter wasp: public votes to name new species after soul-sucking ghouls
(05/05/2014) Whether a die-hard Harry Potter fan or not, you probably know what dementors are. They were the guards of Azkaban —dark hooded evil beings that sucked the soul out of their victims, leaving them alive but 'empty-shelled.' These fictional creatures now share their name with a new species of cockroach wasp, insects that turn cockroaches into zombies.
Bambi in the 21st Century: roe deer not adapting to climate change
(05/01/2014) Once almost extinct in parts of Europe in the late 17th century, the roe deer (Capreolus capreolus) eventually bounced back, and how: today, it is one of the most widespread deer in Europe. But will its luck dry out in the future? A new study published in PLoSBiology suggests that while roe deer populations are still increasing, it may not be adapting to climate change.
Wonderful Creatures: life is a gamble (inside a caterpillar) for the trigonalid wasp
(03/27/2014) Among the huge diversity of insects there are some bewilderingly complex life cycles, but few can compete with the trigonalid wasps for the seemingly haphazard way they ensure their genes are passed to the next generation. In most cases, a female parasitoid wasp deposits her eggs on or in the host, but this is far too pedestrian and safe for the trigonalids. These mavericks of the wasp world, which are also parasitoids, like to make things more difficult for themselves.
Scientist discovers a plethora of new praying mantises (pictures)
(03/19/2014) Despite their pacific name, praying mantises are ferocious top predators with powerful, grasping forelimbs; spiked legs; and mechanistic jaws. In fact, imagine a tiger that can rotate its head 180 degrees or a great white that blends into the waves and you'll have a sense of why praying mantises have developed a reputation. Yet, many praying mantis species remain little known to scientists, according to a new paper in ZooKeys that identifies an astounding 19 new species from the tropical forests of Central and South America.
A Turtle's Tale: researchers discover baby turtles' kindergarten (photos)
(03/14/2014) Kate Mansfield, at her lab in the University of Central Florida, is holding a baby loggerhead turtle, smaller than her palm, painting manicure acrylic on its shell. When the base coat dries out, she glues on top a neoprene patch from an old wetsuit with hair extensions adhesive. Finally, she attaches a satellite tracker on top, the size of a two "party cheese" cubes, with flexible aquarium silicone, powered by a tiny solar battery. Now the little turtle is ready to be released back into the ocean.
Wonderful Creatures: meet the beetle-riding arachnid
(03/06/2014) Without wings, smaller terrestrial animals are really restricted when it comes to moving long distances to find new areas of habitat. However, lots of species get around this problem simply by clinging on to other, more mobile animals. The common, yet overlooked pseudoscorpions are among the most accomplished stowaways, one of which (Cordylochernes scorpiodes) has forged a fascinating relationship with the harlequin beetle, a large, strikingly colored insect.
Featured video: camera traps catch jaguars, anteaters, and a sloth eating clay in the Amazon rainforest
(02/13/2014) These are sights that have rarely been seen by human eyes: a stealthy jaguar, a bustling giant armadillo, and, most amazingly, a sloth slurping up clay from the ground. A new compilation of camera trap videos from Yasuni National Park in the Ecuadorean Amazon shows a staggering array of species, many cryptic and rare.
Incredible encounter: whales devour European eels in the darkness of the ocean depths
(02/11/2014) The Critically Endangered European eel makes one of the most astounding migrations in the wild kingdom. After spending most of its life in Europe's freshwater rivers, the eel embarks on an undersea odyssey, traveling 6,000 kilometers (3,720 miles) to the Sargasso Sea where it will spawn and die. The long-journeying eels larva than make their way back to Europe over nearly a year. Yet by tracking adult European eels (Anguilla anguilla) with electronic data loggers, scientists have discovered that some eels never make it to their spawning ground, but instead are swallowed-up in the depths by leviathans.
Alpine bumblebees capable of flying over Mt. Everest
(02/05/2014) The genus Bombus consists of over 250 species of large, nectar-loving bumblebees. Their bright coloration serves as a warning to predators that they are unwelcome prey and their bodies are covered in a fine coat of hair - known as pile - which gives them their characteristically fuzzy look. Bumblebees display a remarkably capable flight performance despite being encumbered with oversized bodies supported by relatively diminutive wings.
'Flying snakes' achieve surprising lift through unique body shape
(02/04/2014) Flying snakes achieve surprising amounts of lift through the shape of their bodies, report researchers from Virginia Tech in a paper recently published in the Journal of Experimental Biology. The study examined how paradise tree snakes—one of five species of so-called flying snake found in Southeast Asia—shape their bodies to achieve the lift that allows them to glide up to 30 meters between trees.
Predator appreciation: how saving lions, tigers, and polar bears could rescue ourselves
(01/29/2014) In the new book, In Predatory Light: Lions and Tigers and Polar Bears, authors Elizabeth Marshall Thomas, Sy Montgomery, and John Houston, and photographers Cyril Christo and Marie Wilkinson share with us an impassioned and detailed appeal to appreciate three of the world's biggest predators: lions, tigers, and polar bears. Through lengthy discussions, combining themes from scientific conservation to local community folklore, In Predatory Light takes us step by step deeper into the wild world of these awe-inspiring carnivores and their varied plight as they facedown extinction.
For agoutis, the night is fraught with peril
(01/15/2014) In a study recently published in the online Animal Behavior journal, scientists from the US and the Netherlands have examined the impact of predation patterns on prey's food foraging habits. The two-year long study on Barro Colorado Island, Panama, focused on the predator-prey relationship between the Central American agouti (Dasyprocta punctata), a common rainforest rodent, and the ocelot (Leopardus pardalis).
Wonderful Creatures: the lightning-fast Stenus beetles
(01/10/2014) Rove beetles are among the most diverse animals on the planet, with around 56,000 species currently described. Amongst this multitude of species is a dazzling array of adaptations perhaps best illustrated by the genus Stenus. These beetles, with their bulbous eyes and slender bodies are often found near water running swiftly over the wet ground and clambering among the vegetation.
A bird's eye view of hornbills in northeast India
(12/16/2013) Hornbills are as peculiar, as they are magnificent. Their calls especially, can sound rather strange to the uninitiated - some grunt, some growl, and some cackle maniacally. These queer birds, with their large brightly-colored curved beaks, and a distinctive cavity-nesting habit, are also totem animals for many tribes in India.
Like ancient humans, some lemurs slumber in caves
(12/05/2013) After playing, feeding, and socializing in trees all day, some ring-tailed lemurs (Lemur catta) take their nightly respite in caves, according to a new study in Madagascar Conservation and Development. The findings are important because this is the first time scientists have ever recorded primates regularly using caves (see video below).
Animal Earth: exploring the hidden biodiversity of our planet
(12/03/2013) Most of the species on Earth we never see. In fact, we have no idea what they look like, much less how spectacular they are. In general, people can identify relatively few of their backyard species, much less those of other continents. This disconnect likely leads to an inability in the general public to relate to biodiversity and, by extension, the loss of it. One of the most remarkable books I have read is a recent release that makes serious strides to repair that disconnect and affirm the human bond with biodiversity. Animal Earth: The Amazing Diversity of Living Creatures written by Ross Piper, a zoologist with the University of Leeds, opens up the door to discovery.
Reversing local extinction: scientists bring the northern bald ibis back to Europe after 300 years
(12/02/2013) The northern bald ibis (Geronticus eremita), also called the hermit ibis or waldrapp, is a migratory bird. Once, the bald ibis lived in the Middle East, northern Africa and southern and central Europe, but due to hunting, loss of habitat and pesticide-use, the birds disappeared from most of these areas and is currently considered Critically Endangered. It became extinct in Europe 300 years ago; the bird is almost gone in Syria, with only a single individual recorded at the country's lone breeding site in 2013; and the only stronghold left is a small population of around 500 birds in Morocco. But now, a team of scientists from Austria is working to reestablish a self-sustaining, migratory population of bald ibis in Europe.
Coelacanths might be monogamous, to the surprise of researchers
(11/14/2013) They evaded humans for millions of years and live very private lives. The hulking, fleshy-finned fish known as the coelacanth has beguiled scientists for generations. But the coelacanth mystique that enchants researchers also makes it difficult to study. Researchers recently revealed in Nature Communications one startling aspect of the coelacanth lifestyle: they might be monogamous.
Newly discovered beetles construct private homes out of leaf holes and feces
(11/12/2013) Scientists have discovered two new species of leaf beetles in southern India that display a novel way of using leaf holes and their fecal pellets to build shelters – a nesting behavior previously not known among leaf beetles. Discovered in the forests of the Western Ghats in the states of Karnataka and Kerala, the scientists have named these pin-head sized leaf beetles Orthaltica syzygium and Orthaltica terminalia, after the plants they feed on: Syzygium species (e.g., the Java plum) and Terminalia species (e.g., the flowering murdah).
Dolphins, bats and the evolution of echolocation
(11/08/2013) A dolphin swimming through the world’s oceans after fish, and a bat flying through the air with its membranous wings to catch insects or eat fruit: at first glance, it looks like no two creatures could be more different. But it turns out they share a superpower - they hunt prey by emitting high-pitched sounds and listening for a returning echo. A recent study published in the journal Nature Letters has shown that the regions of the genome responsible for this ability are strikingly similar between these very different mammals.
Like humans, marmosets are polite communicators
(11/06/2013) Common marmoset monkeys have been described as having human-like conversations according to a team of researchers from the Princeton Neuroscience Institute. Native to Brazil, marmosets are highly social animals, using simple vocalizations in a multitude of situations: during courtship, keeping groups together and defending themselves. They also, according to the study published in Current Biology, exchange cooperative conversations with anyone and everyone - not just with their mates.
The mystery of the disappearing elephant tusk
(10/30/2013) Give it a few thousand years, and tusks could completely disappear from the Asian elephant (Elephas maximus). The beautifully smooth, elongated ivory incisors neatly bordering a long trunk are iconic in the public mind. The reigning hypothesis is that tusks evolved to help male elephants fight one another, as demonstrated when males compete over females in estrus. However, a recent study published in the journal Animal Behaviour has shown that tusks may not be key factors in tussles, at least as far as elephants are concerned.
Armored giant turns out to be vital ecosystem engineer
(10/24/2013) The giant armadillo (Priodontes maximus) is not called a giant for nothing: it weighs as much as a large dog and grows longer than the world's biggest tortoise. However, despite its gigantism, many people in its range—from the Amazon to the Pantanal—don't even know it exists or believe it to be more mythology than reality. This is a rare megafauna that has long eluded not only scientific study, but even basic human attention. However, undertaking the world's first long-term study of giant armadillos has allowed intrepid biologist, Arnaud Desbiez, to uncovered a wealth of new information about these cryptic creatures. Not only has Desbiez documented giant armadillo reproduction for the first time, but has also discovered that these gentle giants create vital habitats for a variety of other species.
Featured video: bears work together to take down camera traps
(10/24/2013) Scientists with the Wildlife Conservation Society (WCS) have captured stunning images of Andean bear families taking down camera traps in Bolivia's Apolobamba National Natural Area of Integrated Management. In one series of images a mother and her two cubs bite, claw, and whack one of the cameras. However even as they destroy one camera, the bears' antics are captured by another as researchers typically set several cameras to capture different views of animals, a process that helps them identify individuals.
Featured video: 22-year-old produces documentary on the Peruvian Amazon
(10/15/2013) Spending a year on the Tambopata River in Peru's deep Amazon, allowed 22-year-old Tristan Thompson, to record stunning video of the much the region's little seen, and little known, wildlife. Thompson, a student at the University of the West of England, has turned his footage into a new documentary An Untamed Wilderness that not only gives viewers an inside look at the world's greatest forests, but also records the secretive behavior of many species, including howler monkeys, aracaris, leaf-cutter ants, hoatzin, and giant river otters.
No place like home: scientists discover that male crested penguins head home earlier than females
(10/08/2013) Male crested penguins are hard workers - especially when it comes to their elaborate breeding ritual. After gathering in massive colonies to mate, they find and establish a nesting site, help incubate the eggs females lay, and then guard the chicks after they hatch. Male crested penguins have also been known to arrive at their breeding locations long before the females. But the reasons for this have been largely speculative. Do the males start swimming back to their breeding grounds earlier than the females?
Bornean elephant meets palm oil: saving the world's smallest pachyderm in a fractured landscape
(10/01/2013) In the Malaysian state of Sabah, where most conservation students are still foreigners—either European or American—Nurzahafarina Othman stands out: not only is she Malaysian, a Muslim, and a mother of a young daughter, but she's rapidly becoming a top researcher and champion for the world's smallest elephant: the Bornean elephant (Elephas maximus borneensis). Although sometimes described as a pygmy elephant, they still weigh 2,000 kilograms (4,400 pounds). The origin of these 'tiny' elephants in Malaysian Borneo have baffled scientists for decades.
Terror from above: eagle tackles deer in stunning camera trap photos
(09/26/2013) During a routine Amur tiger survey with remote camera traps in December 2011, a few photos gave biologists a shock when they revealed the stunning sight of a golden eagle (Aquila chrysaetos) launching itself on the back of a 7-month old sika deer (Cervus nippon) and bringing down prey that outweighed it by at least seven times. Photographed in remote Far East Russia, the photos show an incredibly-rare instance of an eagle preying on a deer.
Bornean orangutans travel along the ground
(09/12/2013) A recent study of forest in East Kalimantan, Borneo has found that orangutans travel on the ground far more often than expected. The study, published in the American Journal of Primatology, was carried out in Wehea Forest involving the use of 78 camera traps across 38 square kilometres of forest.
Butchering nature's titans: without the elephant 'we lose an essential pillar in the ability to wonder'
(09/12/2013) Africa's elephant poaching crisis doesn't just threaten a species, but imperils one of humanity's most important links to the natural world and even our collective sanity, according to acclaimed photographers and film-makers, Cyril Christo and Marie Wilkinson. Authors of the book Walking Thunder - In the Footsteps of the African Elephant, Christo and Wilkinson have been documenting Africa's titans in photos and film for several years. In 2011, the pair released a film Lysander's Song (named after their son an avid fan of elephants) which depicts the millennial-old relationship between humans and elephants.
Scientists discover that threatened bird migrates entirely within Amazon Basin
(09/11/2013) When one thinks of bird migrations, it's usually a north-south route that follows seasonal climates. But researchers in the Amazon have tracked, for the first time, a largely-unknown long-distance migration that sticks entirely to the Amazon Basin. Using satellite telemetry, scientists tracked a pair of Orinoco geese (Neochen jubata) from Peru and a male from Western Brazil, who both migrated to the Llanos de Moxos, a vast savanna and Amazonian watershed in Bolivia. The research has shown that the Orinoco geese—which breeds in both Peru and Brazil—depends on wetlands in the Llanos de Moxos for much of the year.
Video: scientists discover new walking shark species in Indonesia
(09/11/2013) A species of shark that uses its fins to 'walk' along the bottom of the ocean floor has been discovered off the coast of Indonesia. The shark, Hemiscyllium halmahera, uses its fins to wiggle along the seabed and forage for small fish and crustaceans, scientists from Conservation International said on Friday.
Scientists discover that even crocs have a fetish for fruit
(09/10/2013) It is hard to reconcile visions of a sharp-toothed, scaly, and ferocious crocodile with anything other than a completely carnivorous diet. We have been bombarded with gory kill scenes in which crocodiles take down everything from impala to buffalo, but new evidence suggests we need to rethink crocodilians altogether.
Scientists catch boa constrictor eating a howler monkey (photos)
(09/02/2013) In a world first, scientists have captured images and video of a boa constrictor attacking and devouring whole a femle howler monkey, one of the largest new world primates weighing in at around 4 kilograms (8.8 pounds). The rare predation event was recorded in a tiny forest fragment (2.5 hectares) in the Brazilian state of Rondonia by Erika Patricia Quintino, a PhD student at the Pontifical Catholic University of Rio Grande do Sul.
The evolution of cooperation: communal nests are best for ruffed lemurs
(08/21/2013) Raising young lemurs in communal crèches benefits both mothers and offspring, a new study has found. Andrea Baden and colleagues, of Yale University, studied a group of black-and-white ruffed lemurs (Varecia variegata) in Ranomafana National Park, Madagascar. This is the first study to examine the consequences of different parenting strategies in the ruffed lemur.
Does size matter (for lemur smarts, that is)?
(08/09/2013) Does size matter? When referring to primate brain size and its relation to social intelligence, scientists at Duke University do not think the answer is a simple yes or no. In the past, scientists have correlated large brain size to large group size. However, in a new study published in PLoS ONE, scientists at Duke University provide evidence that large social networks, rather than large brains, contribute to social cognition, favoring the evolution of social intelligence.
Cheetah don’t overheat during hunts
(07/25/2013) A new study published in Biology Letters finds that contrary to popular opinion, cheetah don’t overheat during hunts. But their body temperature rises after successful hunts due to stress than another predator may seize their prey.
Scientists build app to automatically identify species based on their calls
(07/16/2013) New technology makes it possible to automatically identify species by their vocalizations. The platform, detailed in the current issue of the journal PeerJ, has been used at sites in Puerto Rico and Costa Rica to identify frogs, insects, birds, and monkeys. Many of the animals identified by the system are typically difficult to spot in their natural environment, but audio recordings of their calls reveal not only their presence but also their activity patterns.
To protect themselves, lemurs learn alarm calls of other species
(07/11/2013) Solitary lemurs in Madagascar rely on the alarm calls of birds and more social lemurs to evade predators, reports a study published in PLoS ONE.
Loris champion: conserving the world's most surprising primate family
(06/04/2013) Before Anna Nekaris began championing the cause of the world's lorises, little was known about this cryptic family of large-eyed, nocturnal, insect-eating, venomous primates. Nekaris, with Oxford Brookes University and founder of the Little Fireface project, has been instrumental in documenting rarely-seen loris behavior, establishing conservation programs, and identifying new species of these hugely-imperiled Asian primates.
Featured video: a glimpse into the life of Cambodia’s Asian elephant
(05/29/2013) The Cambodian Government’s Forestry Administration has recently teamed up with the Wildlife Conservation Society (WCS) in order to peer into the daily lives of the country’s Asian Elephants (Elephas maximus). Through the use of camera traps, the organizations caught an intimate glimpse of the regular, day-to-day behavior of these animals.
Whales teach each other new feeding behavior
(05/29/2013) Humpback whales (Megaptera novaeangliae), popularly known for their majestic and alluring underwater mating songs and acrobatic breaches, have shown that they can adapt to changing prey variability by passing on new hunting techniques to each other. According to new findings in the journal Science, a team of researchers have revealed the cultural spread of new hunting techniques through a population of humpback whales over the span of 27 years.
Featured video: giant anteater wallowing and scratching like a dog
(05/28/2013) Scientists have recently taken rare and incredible footage of a giant anteater with a camera trap in the Barba Azul Nature Reserve of Bolivia. This footage captures a giant anteater wallowing in a pit of mud. The animal lies down, rolling around and scratching itself, for a period of, what seems to be, over a minute.
Snowy tigers and giant owls: conservation against the odds in Russia's Far East
(05/28/2013) The Russian Far East is one of the wildest places on Earth: where giant tigers roam snow-covered forests and the world's biggest owls stalk frozen rivers. Bordering northern China and North Korea, the forests of Primorye are known for the diversity of habitats, including coastal forests along the Sea of Japan, vast coniferous forests in the Sikhote-Alin mountains, and even steppe. These diverse ecosystems also makes the forests a hotspot for endangered species, including Amur tigers (Panthera tigris altaica), Blakiston's fish owls (Bubo blakistoni), and one of the world's rarest big cats, Amur leopards (Panthera pardus orientalis), which number only 30-50 animals.
Famed bird reappears after 400,000 miles of flight
(05/22/2013) A migratory shorebird that has flown more than 400,000 miles has reappeared once again.
Crazy cat numbers: unusually high jaguar densities discovered in the Amazon rainforest
(05/16/2013) Jaguars (Panthera onca) are the biggest cat in the Americas and the only member of the Panthera genus in the New World; an animal most people recognize, the jaguar is also the third largest cat in the world with an intoxicatingly dangerous beauty. The feline ranges from the harsh deserts of southern Arizona to the lush rainforests of Central America, and from the Pantanal wetlands all the way down to northern Argentina. These mega-predators stalk prey quietly through the grasses of Venezuelan savannas, prowl the Atlantic forests of eastern Brazil, hunt along the river of the Amazon, and even venture into lower parts of the Andes.
Common moth can hear higher frequencies than any other animal on Earth
(05/09/2013) A common little moth turns out to have the best ears in the animal kingdom. According to a new study in Biology Letters, the greater wax moth (Galleria mellonella) is capable of hearing frequencies up to 300,000 hertz (300kHz), which is 15 times the frequency humans can hear at their prime, around 20 kHz.
Are seagulls killing whales in Patagonia?
(05/08/2013) It sounds ludicrous, but it could just be true: scientists say seagulls may be responsible for hundreds of southern right whale moralities off the Argentine coastline. Since 2003, scientists have documented the deaths of 605 southern right whales (Eubalaena australis) near Península Valdés which the whales use as a nursery. Notably, 88 percent of these were newborn calves. The death rate is so high that researchers now fear for the whales' long-term survival.
A Tale of Two Elephants: celebrating the lives and mourning the deaths of Cirrocumulus and Ngampit
(05/07/2013) On March 21st, the organization Save the Elephants posted on their Facebook page that two African elephants had been poached inside a nearby reserve: "Sad news from the north of Kenya. Usually the national reserves are safe havens for elephants, and they know it. But in the last two weeks two of our study animals have been shot inside the Buffalo Springs reserve. First an 18 year-old bull called Ngampit and then, yesterday, 23 year-old female called Cirrocumulus (from the Clouds family)."
Bat's tongue could inspire miniature surgical robot design
(05/06/2013) Nectar-feeding bats shift the shape of their tongue to slurp up sugar from flowers upon which they feed, finds a new study published in the Proceedings of the National Academy of Sciences.
Hibernating primates: scientists discover three lemur species sleep like bears
(05/02/2013) Bears do it, bats do it, and now we know lemurs do it too: hibernate, that is. Since 2005, scientists have known that the western fat-tailed dwarf lemur hibernates, but a new study in Scientific Reports finds that hibernation is more widespread among lemurs than expected. At least two additional lemur species—Crossley's dwarf lemur and Sibree's dwarf lemur—have been discovered hibernating. So far lemurs, which are only found on the island of Madagascar, are the only primates known to undergo hibernation, raising curious questions about the relationship between lemur hibernation and more well-known deep sleepers.
Clownfish helps its anemone host to breathe
(04/24/2013) The sight of a clownfish wriggling through the stinging tentacles of its anemone is a familiar and seemingly well-understood one to most people—the stinging anemone provides a protective home for the clownfish who is immune to such stings, and in turn the clownfish chases away any polyp-eating sunfish eyeing the anemone's tentacles for a meal. But recent research has shown that all that clownfish wriggling significantly helps to oxygenate the anemone at night, when oxygen levels in the water are low.
An insidious threat to tropical forests: over-hunting endangers tree species in Asia and Africa
(04/04/2013) A fruit falls to the floor in a rainforest. It waits. And waits. Inside the fruit is a seed, and like most seeds in tropical forests, this one needs an animal—a good-sized animal—to move it to a new place where it can germinate and grow. But it may be waiting in vain. Hunting and poaching has decimated many mammal and bird populations across the tropics, and according to two new studies the loss of these important seed-disperser are imperiling the very nature of rainforests.
Proposed coal plant threatens Critically Endangered Philippine cockatoo
(04/02/2013) One kilometer off the Philippine island of Palawan lies the Rasa Island Wildlife Sanctuary; here forest grows unimpeded from a coral island surrounded by mangroves and coral reefs. Although tiny, over a hundred bird species have been recorded on the island along with a major population of large flying foxes, while in the waters below swim at least 130 species of coral fish, three types of marine turtles, and that curious-looking marine mammal, dugongs. Most importantly, perhaps, the island is home to the world's largest population of Philippine cockatoos (Cacatua haematuropygia), currently listed as Critically Endangered. But, although uninhabited by people, Rasa Island may soon be altered irrevocably by human impacts.
Relative of the 'penis snake' discovered in South America (photos)
(03/27/2013) A new species of caecilian - a worm-like amphibian - has been discovered in French Guiana.
Male lions require dense vegetation for successful ambush hunting
(03/20/2013) For a long time male lions were derided as the lazy ones in the pride, depending on females for the bulk of hunting and not pulling their weight. Much of this was based on field observations—female lions hunt cooperatively, often in open savannah, and therefore are easier to track at night. But new research in Animal Behaviour is showing that males are adroit hunters in their own right, except prickly males hunt alone and use dense vegetation as cover; instead of social hunting in open savannah, they depend on ambushing unsuspecting prey.
Scientists successfully reintroduce gaur in Indian park
(03/18/2013) Gaur (Bos gaurus gaurus) is one of the large wild ungulates of Asian jungles. It is the tallest living ox, and one of the four heaviest land mammals (elephant, rhino and wild buffalo are the other three), weighing up to 940 kilograms (2,070 pounds) and standing between 1.6 and 1.9 meters (5.2 to 6.2 feet) at the shoulder. Gaur were once distributed throughout the forested tracts of India and South Nepal, east to Vietnam and south to Malaya. Today, however, they are confined to just over a hundred existing, and 27 proposed, Protected Areas in India.
Seeing the forest through the elephants: slaughtered elephants taking rainforest trees with them
(03/11/2013) Elephants are vanishing. The booming illegal ivory trade is decimating the world's largest land animal, but no place has been harder hit than the Congo basin and its forest elephants (Loxodonta cyclotis). The numbers are staggering: a single park in Gabon, Minkebe National Park, has seen 11,100 forest elephants killed in the last eight years; Okapi Faunal Reserve in the Democratic Republic of the Congo has lost 75 percent of its elephants in fifteen years; and a new study in PLoS ONE estimates that in total 60 percent of the world's forest elephants have been killed in the last decade alone. But what does that mean for the Congo forest?
Jaguars, tapirs, oh my!: Amazon explorer films shocking wildlife bonanza in threatened forest
(02/19/2013) Watching a new video by Amazon explorer, Paul Rosolie, one feels transported into a hidden world of stalking jaguars, heavyweight tapirs, and daylight-wandering giant armadillos. This is the Amazon as one imagines it as a child: still full of wild things. In just four weeks at a single colpa (or clay lick where mammals and birds gather) on the lower Las Piedras River, Rosolie and his team captured 30 Amazonian species on video, including seven imperiled species. However, the very spot Rosolie and his team filmed is under threat: the lower Las Piedras River is being infiltrated by loggers, miners, and farmers following the construction of the Trans-Amazon highway.
Pity the pangolin: little-known mammal most common victim of the wildlife trade
(02/11/2013) Last year tens-of-thousands of elephants and hundreds of rhinos were butchered to feed the growing appetite of the illegal wildlife trade. This black market, largely centered in East Asia, also devoured tigers, sharks, leopards, turtles, snakes, and hundreds of other animals. Estimated at $19 billion annually, the booming trade has periodically captured global media attention, even receiving a high-profile speech by U.S. Secretary of State, Hillary Clinton, last year. But the biggest mammal victim of the wildlife trade is not elephants, rhinos, or tigers, but an animal that receives little notice and even less press: the pangolin. If that name doesn't ring a bell, you're not alone.
Claim of human and tiger 'coexistence' lacks perspective
(01/29/2013) Nepal's Chitwan National Park was the site of a study, published in September 2012 by Carter and others, which concluded that, tigers coexist with humans at fine spatial scales. This paper has ignited a scientific debate regarding its implications for large carnivore conservation worldwide, with scientists at institutions worldwide questioning the validity of claims of coexistence. At the foundation of this debate, perhaps, is the unresolved question, "what is coexistence?"
Save Lolita: new film urges release of captive killer whale
(01/22/2013) Through his new 90-second PSA, Save Lolita, filmmaker Daniel Azarian wanted to connect people to the plight of Lolita on a deeply human level; the only problem: Lolita is an orca, also known as a killer whale. But the stark, moving PSA succeeds, given the sociability of an individual—human or orca—who was stolen from her family and held in captivity for the past 42 years at Miami's Seaquarium.
Landmines, chains, and hope: the elephants of Thailand
(01/15/2013) Few animals draw more compassion and awe from people than elephants. Highly intelligent, deeply social, and touchingly sensitive, elephants have much in common with human beings, despite their size and shape. Yet elephants around the world are still often abused and mis-treated, whether to entertain tourists or as victims of human strife. A new film, The Last Elephants in Thailand, sets out to document both the good and bad that elephants encounter in a world dominated by homo sapiens.
Mercury hurts birds and people: what we can learn from studying our feathered friends
(01/07/2013) Birds aren't that different from people. We learn from our parents, just like zebra finches learn songs from their fathers. We are active and noisy during the day, like birds, and we can also be territorial. Also like birds, we try to attract mates through colorful displays and beautiful songs. Birds are sensitive to pollution in their environment just like we are: harmful elements such as mercury wreak similar havoc on human and bird biology alike. Because our species share so many attributes, studying birds illustrates the connections between them and us.
Western scrub jay funerals...what's all the ruckus?
(12/10/2012) The western scrub jay (Aphelocoma californica) is a common denizen of suburban neighborhoods in the U.S., loitering at bird feeders and amusing bird watchers with their entertaining antics. Known to birders as 'WESJ,' this handsome bird is non-migratory and territorial during the breeding season, but what's curious about WESJ's is the way they respond to risks in their environment. When descended on by a predator or encountering a dead member of its kind, these birds hop from perch to perch and call loudly, ensuing in a 'cacophonous reaction,' a term coined by researchers at the University of California, Davis who are studying the behavior of these unique birds.
Despite small brains, gray mouse lemurs use calls to avoid inbreeding
(12/03/2012) As a small-brained and largely solitary primate, the gray mouse lemur (Microcebus murinus) wasn't supposed to have the capacity to distinguish the calls of its kin calls from other lemurs. However, a new study in BMC Ecology, finds that a female gray mouse lemur is able to determine the mating calls of its father, allowing it avoid inbreeding. The discovery challenges the long-held belief that only large-brained, highly social animal are capable of determining kin from calls.
New Guinea singing dog photographed in the wild for the first time
(12/03/2012) A rarely seen canine has been photographed in the wild, likely for the first time. Tom Hewitt, director of Adventure Alternative Borneo, photographed the New Guinea singing dog during a 12-day expedition up a remote mountain in Indonesian Papua. Very closely related to the Australian dingo, the New Guinea singing dog, so named for its unique vocalizations, has become hugely threatened by hybridization with domesticated dogs.
Reduction in snow threatens Arctic seals
(11/28/2012) Arctic snowfall accumulation plays a critical role in ringed seal breeding, but may be at risk due to climate change, according to a new study in Geophysical Research Letters. Sea ice, which is disappearing at an alarming rate, provides a crucial platform for the deep snow seals need to reproduce. Ringed seals (Phoca hispida) require snow depths of at least 20 centimeters (8 inches): deep enough to form drifts that seals use as birth chambers.
Photos: Chinese leopard wins camera trap contest
(11/27/2012) The third annual BBC Wildlife Magazine Camera Trap Photo of the Year contest has produced some stunning and surprising images, including a snow leopard sticking its tongue out, a rare giant pangolin, and wrestling monitor lizards. But the winner this year was the perfect shot of a young leopard in China.
Endangered muriqui monkeys in Brazil full of surprises
(11/26/2012) On paper, the northern muriquis (Brachyteles hypoxanthus) look like a conservation comeback story. Three decades ago, only 60 of the gentle, tree-dwelling primates lived in a fragment of the Atlantic Forest along the eastern coast of Brazil. Now there are more than 300. But numbers don’t tell the whole story, according to anthropologist Karen Strier and theoretical ecologist Anthony Ives of the University of Wisconsin, Madison. The pair analyzed 28 years of data on the demographics of the muriquis, one of the longest studies of its kind. They found surprising patterns about birth and death rates, sex ratios, and even how often the monkeys venture out of their trees. These findings raise questions about the muriquis’ long-term survival and how best to protect them, the scientists wrote in the Sept 17 issue of PLoS ONE.
Great apes suffer mid-life crisis too
(11/19/2012) Homo sapiens are not alone in experiencing a dip in happiness during middle age (often referred to as a mid-life crisis) since great apes suffer the same according to new research in the Proceedings of the National Academy of Sciences (PNAS). A new study of over 500 great apes (336 chimpanzees and 172 orangutans) found that well-being patterns in primates are similar to those experience by humans. This doesn't mean that middle age apes seek out the sportiest trees or hit-on younger apes inappropriately, but rather that their well-being starts high in youth, dips in middle age, and rises again in old age.
Clever crows may grasp hidden causes
(11/15/2012) Crows may be imagining more than we imagined. New research suggests certain crows make decisions based on factors they can’t see. A recent study published in the Proceedings of the National Academy of Sciences (PNAS) deepens our understanding of these crafty corvids, and could help explain how human reasoning evolved. Crows are intelligent problem solvers, capable of making hook-shaped tools to retrieve food and using multiple tools in a logical sequence. New Caledonian crows (Corvus moneduloides) are particularly adept tool users, and have often been the subject of cognitive research. In this study, the New Zealand–based researchers tested whether New Caledonian crows could trace an event back to a cause that was hidden from their view.
New species of bioluminescent cockroach possibly already extinct by volcanic eruption
(11/14/2012) While new species are discovered every day, Peter Vršanský and company's discovery of a light-producing cockroach, Lucihormetica luckae, in Ecuador is remarkable for many reasons, not the least that it may already be extinct. The new species represents the only known case of mimicry by bioluminescence in a land animal. Like a venomless king snake beating its tail to copy the unmistakable warning of a rattlesnake, Lucihormetica luckae's bioluminescent patterns are nearly identical to the poisonous click beetle, with which it shares (or shared) its habitat.
Above the ocean: saving the world's most threatened birds
(11/01/2012) A life on the ocean is a perilous one for any bird. They must expend energy staying aloft for thousands of miles and learn to be marathon swimmers; they must seek food beneath treacherous waves and brave the world's most extreme climates; they must navigate the perils both of an unforgiving sea and far-flung islands. Yet seabirds, which includes 346 global species that depend on marine ecosystems, have evolved numerous strategies and complex life histories to deal with the challenges of the sea successfully, and they have been doing so since the dinosaur’s last stand. Today, despite such a track record, no other bird family is more threatened; yet it's not the wild, unpredictable sea that endangers them, but pervasive human impacts.
Happy Halloween: nine new species of tree-climbing tarantula discovered
(10/31/2012) If you suffer from acute arachnophobia, this is the perfect Halloween discovery for you: a spider expert has discovered nine new species of arboreal (tree-dwelling) tarantulas in the Brazil. Although tarantula diversity is highest in the Amazon rainforest, the new species are all found in lesser-known Brazilian ecosystems like the Atlantic Forest, of which less than 7 percent remains, and the cerrado, a massive savannah that is being rapidly lost to agriculture and cattle ranching.
By imitating human voices, beluga whale may have been attempting to communicate
(10/23/2012) Five years after the death of a captive beluga whale named NOC, researchers have discovered that the marine mammal may have been trying to communicate with people by mimicking humans voices at the National Marine Mammal Foundation in San Diego. Analyzing tapes of human-like speech from the young male beluga whale, scientists writing in Current Biology note that while there have been reports of beluga whales making human like sounds before, this is the first time evidence has been captured on tape and analyzed.
Endangered turtle urinates through its mouth
(10/11/2012) One of China's most commonly farmed turtles for consumption, the Chinese soft-shelled turtle (Pelodiscus sinensis), has a unique ability: it urinates out of its mouth. Researchers in Singapore, writing in The Journal of Experimental Biology, have discovered that the Chinese soft-shelled turtle excretes most of its urine from its mouth instead of its kidneys. They hypothesize that the turtle developed this ability in order to survive in brackish waters, which contain considerably more salt than freshwater.
Appreciating elephant individuality: a new approach to preventing conflicts with humans
(10/09/2012) To prevent conflicts between humans and elephants in developed areas, a new study shows there is much to learn from analyzing Asian elephant behavior at the individual level as opposed to population studies. Researchers have traditionally interpreted elephant behavior at the population level, looking for behavior patterns among elephants of similar ages, group sizes, and genders. Today, field researchers in India are studying elephant behavior at the individual level. Their goal is to appreciate the idiosyncrasies of individual elephants in the hopes of predicting their behavior. Nishant Srinivasaiah, of the Tata Institute of Fundamental Research and lead author of the study, told mongabay.com that it is vital "to get to know our elephants more intimately than ever before and, more importantly, to shift our focus from a population to include its individuals as well."
Brainless slime mold uses slimy memory to navigate
(10/08/2012) How do you navigate space efficiently without a brain? Slime, according to a surprising new study in the Proceedings of the National Academy of Sciences (PNAS) of a brainless slime mold named Physarum polycephalum. Scientists at the University of Sydney have discovered that the mold secretes slime as an 'external spatial memory' to make sure it doesn't end up going around in circles.
Mr. Darcy and the Manic Pixie Dream Girl: monkeys display distinct personality types
(10/01/2012) Remember the 'man with no name' played by Clint Eastwood in A Fistful of Dollars, Mr. Darcy in Jane Austen's Pride and Prejudice, or the bubbly cute girl in every romantic comedy from Legally Blonde to Breakfast at Tiffany's? Each of these characters represent an over-the-top type of human personality—loner (man with no name), aloof (Darcy), and nice (the bubbly cute girl)—but a new study in the Proceedings of the National Academy of Sciences (PNAS) finds that it's not only humans that show such distinct types, but baboons as well. Studying 45 female chacma baboons in Botswana's Moremi Game Reserve over seven years, the researchers found that such personality types, unrelated to social statues, helped to determine the animals' overall sociability and the stability of their relationships.
Sacrificial squid has unique way of deterring predators
(09/04/2012) Octopoteuthis deletron—this deep-dwelling, unassuming little squid may appear plain and boring, but when threatened, it has a peculiar way of defending itself. This foot-long invertebrate behaves a bit differently than most of its close cousins: it drops its arms.
One extinction leads to another...and another
(08/28/2012) A new study in Biology Letters demonstrates that altering the relationship between a predator and its prey can cause wide-ranging ripple effects through an ecosystem, including unexpected extinctions. Species help each other, directly or indirectly, which scientists refer to as mutualism or commensalism. For example, a species’ success may rely not only upon the survival of its food source, but may also indirectly rely upon the survival of more distantly related species.
Bird uses hurricane winds to accelerate flight speed to 100 MPH
(08/24/2012) Migrating Whimbrels — a type of shorebird — may struggle for hours against winds when trying to cross the Caribbean during hurricane season but get a huge boost as they fly out of storms, report researchers from the Center for Conservation Biology in Williamsburg, Virginia.
Rodent robbers fill role of mega mammals, help spread tropical trees
(08/07/2012) In order to disperse their seeds, large-fruited tropical trees probably relied on massive mammals that roamed the earth over 10,000 years ago. But with giants such as the mastodon now extinct, thieving rodents—who continually excavate and rebury others' seeds—may be filling their role, according to a new study in the Proceedings of the National Academy of Sciences (PNAS).
Featured video: see the world from the eyes of a cormorant
(07/31/2012) Scientists have succeeded in capturing amazing footage of the imperial cormorant (Phalacrocorax atriceps) diving 150 feet below the ocean's surface—and it's from the bird's point of view!
Nature's Compass: The Mystery of Animal Navigation – Book Review
(07/06/2012) Migration patterns, natal homing, and daily activities by animals all require significant navigation capacities. In Nature’s Compass: The Mystery of Animal Navigation, Dr. James L. Gould and Carol Grant Gould explore the mathematical and physical underpinnings of what it takes for these species to successfully navigate.
'Time pollution': loss of predators pushes nocturnal fish to take advantage of the day
(06/25/2012) Nocturnal fish—which sport big eyes for improved night vision—are taking back the day in the coral reefs of the Tabuaeran Atoll, according to a new study in the open-access journal PLoS ONE. Overfishing has plundered the Pacific atoll of many of its notable predators, including sharks and barracudas, causing ripple effects through the ecosystem. One of these emerging changes appears to be that with less fear of being eaten, nocturnal fish are increasingly venturing out during the day.
Featured video: baby hornbills grow up in a jar
(05/29/2012) A researcher in Malaysia has captured footage of Oriental pied hornbills (Anthracoceros albirostris) raising chicks in an earthen jar in the Kenyir rainforest of Malaysia. The first video shows the father Oriental pied hornbill feeding the chicks, while the second shows a chick leaving its nest.
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