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News articles on Evolution
Mongabay.com news articles on Evolution in blog format. Updated regularly.
Halloween in the Amazon: baby bird dresses up like killer caterpillar
(03/23/2015) 'Mama, I wanna be a toxic caterpillar,' says the little bird. 'Okay,' mamma answers, 'but first you gotta study your Batesian mimicry.' Meet the cinereous mourner, an ash-colored, Amazonian bird that looks rather hum-drum compared to many other birds found in the region. Yet, scientists have discovered something special about the birds: its newborn babies look and move like a neon orange, toxic caterpillar.
Genetics study sheds light on Chile’s most endangered bird
(12/22/2014) A member of the Furnariidae family, the small brown and beige bird possesses rusty “spine-like” tail feathers and inhabits densely vegetated areas. Scientists estimate the total population to range from 140 to 500 individuals. In 2012 the IUCN declared the Masafuera Rayadito to be a Critically Endangered species.
Lizard see, lizard do: scientists discover surprising behavior in reptiles
(12/10/2014) Imitation can be obnoxious. For those with siblings, imitating your brother's or sister's every word was a surefire way to steadily drive them toward insanity. Annoying it may be, imitation is also special; it's a behavior long regarded to be uniquely human. The skill of imitation is a little less exclusive now, as reptiles join the ranks of creatures capable of the social feat. Researchers from the United Kingdom and Austria recently demonstrated that one lizard, the bearded dragon (Pogona vitticeps), can learn through imitation.
One-two punch: farming, global warming destroying unique East African forests
(12/03/2014) Lush mountains speckle East Africa's grasslands and desert, from Mozambique to Ethiopia. These isolated habitats are home to a plethora of species, and are considered by scientists to be some of the most biodiverse regions in the world. However, their forests are being cut down for farmland and are threatened by global warming, putting at risk multitudes of species that have nowhere else to go.
New birds arise due to emigration not separation
(11/11/2014) A bird's eye view of speciation in the Neotropics. How long does it take for a new species to develop? Not long, it turns out. In fact, only a few thousand years — an evolutionary blink of an eye. A recent article published in Nature tracked neotropical bird speciation, or the process by which new species emerge.
Jane Goodall joins mongabay
(10/13/2014) Famed primatologist and conservationist Jane Goodall—whose image is known the world over—has joined the advisory board of mongabay.org. This is the non-profit branch of mongabay.com, an environmental and science website with a special focus on tropical forests. Goodall first came to global prominence at the age of 26 when she set off to Gombe Stream National Park, Tanzania to study chimpanzee behavior.
Outcompeted: Species competition may result in geographic isolation
(10/03/2014) Scientists have long believed that gene flow and species dispersal is only interrupted by physical barriers, like mountain ranges, rivers or even the complete disappearance of a suitable habitat. But new research into the distribution of two mouse opossum species in South America suggests that other factors may play a role as well, such as competition and predation.
Did the world's only venomous primate evolve to mimic the cobra?
(09/29/2014) The bite of a slow loris can be painful, and sometimes even lethal. After all, this cute-looking YouTube sensation is the only known 'venomous' primate in the world—a trait that might have strangely evolved to mimic spectacled cobras, according to a recent paper. Mimicry in mammals is rare. But anecdotal evidence and studies in the past have noted the uncanny cobra-like defensive postures, sounds, and gait in slow lorises.
Bizarre lizard newest victim of reptile pet trade
(09/15/2014) If you've never heard of the earless monitor lizard, you're not alone: this cryptic lizard has long-escaped the attention of the larger public. But over the past couple years its bizarre appearance has been splashed across social media sites for reptile collectors. While this decidedly-quirky attention may seem benign, it could actually threaten the species' existence.
Titanium vs. Millipedes: new species discovered in Madagascar threatened by mining
(08/13/2014) A team of scientists from the United States and Germany has recently described seven new species of Malagasy giant pill-millipede. All but one of these species are considered “microendemics,” in that they have only been found in small, isolated forest patches.
Forgotten species: the exotic squirrel with a super tail
(08/13/2014) With among the world's largest tails compared to body-size, the tufted ground squirrel just might be the most exotic squirrel species on the planet. Found only on the island of Borneo, this threatened species is also surrounded by wild tales, including the tenacity to take down a deer for dinner. New research explores the squirrel's monster tail and whether other tales about it may be true.
They think, therefore they spread: plants can make complex conditional decisions
(07/07/2014) Strong memory, being able to predict the future, and acting based on one’s surroundings are traits typically associated only with the most advanced types of animals. However, a team of German and Dutch scientists from the Helmholtz Center for Environmental Research (UFZ) and the University of Göttingen found ecological evidence that plants also have these abilities.
Super cute, but tiny, elephant-relative discovered in Namibia
(06/30/2014) Forget marsupials, the world's strangest group of mammals are actually those in the Afrotheria order. This superorder of mammals contains a motley crew that at first glance seems to have nothing in common: from elephants to rodent-sized sengi. Last week, scientists announced the newest, and arguably cutest, member of Atrotheria: the Etendeka round-eared sengi.
Scientists discover carnivorous water rat in Indonesia, good example of convergent evolution
(06/19/2014) Researchers have discovered a new carnivorous water rat on the island of Sulawesi that's so unique it represents an entirely new genus. They believe many more new rodent species await discovery in this relatively undisturbed part of Indonesia, but mining and other types of development may threaten vital habitat before it’s even surveyed.
Scientists uncover new marine mammal genus, represented by single endangered species
(05/14/2014) This is the story of three seals: the Caribbean, the Hawaiian, and the Mediterranean monk seals. Once numbering in the hundreds of thousands, the Caribbean monk seal was a hugely abundant marine mammal found across the Caribbean, and even recorded by Christopher Columbus during his second voyage, whose men killed several for food.
Giant ibis, little dodo, and the kakapo: meet the 100 weirdest and most endangered birds
(04/10/2014) The comic dodo, the stately great auk, the passenger pigeon blotting out the skies: human kind has wiped out nearly 200 species of birds in the last five hundred years. Now, if we don't act soon we'll add many new ones to the list: birds such as the giant ibis, the plains-wanderer, and the crow honeyeater. And these are just a few of the species that appear today on the long-awaited EDGE list.
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.
Sloths, moths and algae: a surprising partnership sheds light on a mystery
(03/22/2014) While it spends the majority of its time in the safety of tree canopies, the three-toed sloth regularly places itself in mortal danger by descending to the forest floor to defecate. For years, scientists have been trying to figure out what is driving this peculiar and risky behavior. Now, Jonathan Pauli from the University of Wisconsin-Madison believes his team of researchers has found an important clue to this mystery involving an unusual and beneficial relationship among sloths, moths and algae.
Scientists discover single gene that enables multiple morphs in a butterfly
(03/10/2014) Scientists have discovered the gene enabling multiple female morphs that give the Common Mormon butterfly its very tongue-in-cheek name. doublesex, the gene that controls gender in insects, is also a mimicry supergene that determines diverse wing patterns in this butterfly, according to a recent study published in Nature. The study also shows that the supergene is not a cluster of closely-linked genes as postulated for nearly half a century, but a single gene controlling all the variations exhibited by the butterfly's wings.
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.
Amazon trees super-diverse in chemicals
(03/03/2014) In the Western Amazon—arguably the world's most biodiverse region—scientists have found that not only is the forest super-rich in species, but also in chemicals. Climbing into the canopy of thousands of trees across 19 different forests in the region—from the lowland Amazon to high Andean cloud forests—the researchers sampled chemical signatures from canopy leaves and were surprised by the levels of diversity uncovered.
Wonderful Creatures: the tiny, predatory penis-worm that lies in wait in the sand
(02/28/2014) The seabed is really where it’s at in terms of animal diversity. Of the 35 known animal lineages, representatives of all but two are found here. In contrast, the huge numbers of species that inhabit tropical rainforests represent a mere 12 lineages. One group of animals that illustrates the diversity of the seabed is the Priapulida, which also go by the unfortunate common name of "penis worms." Only 20 species of priapulid are known today, a shadow of their diverse past, which extends back for well over 500 million years. Not commonly seen, the priapulids have attracted little attention from the zoology community as a whole.
The lemur end-game: scientists propose ambitious plan to save the world's most imperiled mammal family
(02/20/2014) Due to the wonderful idiosyncrasies of evolution, there is one country on Earth that houses 20 percent of the world's primates. More astounding still, every single one of these primates—an entire distinct family in fact—are found no-where else. The country is, of course, Madagascar and the primates in question are, of course, lemurs. But the far-flung island of Madagascar, once a safe haven for wild evolutionary experiments, has become an ecological nightmare. Overpopulation, deep poverty, political instability, slash-and-burn agriculture, illegal logging for lucrative woods, and a booming bushmeat trade has placed 94 percent of the world's lemurs under threat of extinction, making this the most imperiled mammal group on the planet. But, in order to stem a rapid march toward extinction, conservationists today publicized an emergency three year plan to safeguard 30 important lemur forests in the journal Science.
Wonderful Creatures: the bizarre-looking marine worm with an incredibly important ecological role
(02/13/2014) Almost everyone knows what an earthworm is, but these very familiar animals are just one variation on a very rich theme that is at its most fabulously varied in the oceans. The mind-boggling appearances and lifestyles of the marine segmented worms are perfectly exemplified by this week's animal.
Photos: mass turtle hatching produces over 200,000 babies
(02/11/2014) Biologists recently documented one of nature's least-known, big events. On the banks of the Purus River in the Brazilian Amazon, researchers witnessed the mass-hatching of an estimated 210,000 giant South American river turtles (Podocnemis expansa). The giant South American river turtle, or Arrau, is the world's largest side-necked turtle and can grow up to 80 centimeters long (nearly three feet).
On edge of extinction, could drones and technology save the Little Dodo?
(02/10/2014) Almost nothing is known about the little dodo, a large, archaic, pigeon-like bird found only on the islands of Samoa. Worse still, this truly bizarre bird is on the verge of extinction, following the fate of its much more famous relative, the dodo bird. Recently, conservationists estimated that fewer than 200 survived on the island and maybe far fewer; frustratingly, sightings of the bird have been almost non-existent in recent years. But conservation efforts were buoyed this December when researchers stumbled on a juvenile little dodo hanging out in a tree. Not only was this an important sighting of a nearly-extinct species, but even more so it proved the species is still successfully breeding. In other words: there is still time to save the species from extinction so long as conservationists are able to raise the funds needed.
Scientists make one of the biggest animal discoveries of the century: a new tapir
(12/16/2013) In what will likely be considered one of the biggest (literally) zoological discoveries of the Twenty-First Century, scientists today announced they have discovered a new species of tapir in Brazil and Colombia. The new mammal, hidden from science but known to local indigenous tribes, is actually one of the biggest animals on the continent, although it's still the smallest living tapir. Described in the Journal of Mammology, the scientists have named the new tapir Tapirus kabomani after the name for 'tapir' in the local Paumari language: Arabo kabomani.
Odd porcupine hugely imperiled by hunting, deforestation
(12/16/2013) The thin-spined porcupine, also known as the bristle-spined rat, is a truly distinct animal: a sort of cross between New World porcupines and spiny rats with genetic research showing it is slightly closer to the former rather than the latter. But the thin-spined porcupine (Chaetomys subspinosus), found only in Brazil's Atlantic Forest, is imperiled by human activities. In fact, a new study in mongabay.com's open access journal Tropical Conservation Science found that the species remains a target for hunters, despite a reputation for tasting terrible.
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).
Sky islands: exploring East Africa's last frontier
(12/04/2013) The montane rainforests of East Africa are little-known to the global public. The Amazon and Congo loom much larger in our minds, while the savannas of East Africa remain the iconic ecosystems for the region. However these ancient, biodiverse forests—sitting on the tops of mountains rising from the African savanna—are home to some remarkable species, many found only in a single forest. A team of international scientists—Michele Menegon, Fabio Pupin, and Simon Loader—have made it their mission to document the little-known reptiles and amphibians in these so-called sky islands, many of which are highly imperiled.
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.
Meeting the mammal that survived the dinosaurs
(10/14/2013) So, here I am, running in a forest at night over 2,000 miles from home. This forest—dry, stout, and thorny enough to draw blood—lies just a few miles north of a rural town in the western edge of the Dominican Republic on the border with Haiti. I'm following—or trying to keep pace with—a local hunter and guide as we search for one of the world's most bizarre mammals. It's an animal few people have heard of, let alone actually seen; even most Dominicans don't readily recognize its name or picture. But I've been obsessed with it for six years: it's called a "solenodon," more accurately the Hispaniolan solenodon or its (quite appropriate) scientific name, Solenodon paradoxus.
Featured video: 'this is day one for the olinguito'
(09/04/2013) Last month scientists unveiled a remarkable discovery: a new mammal in the order Carnivora (even though it mostly lives off fruits) in the Andean cloud forests. This was the first new mammal from that order in the Western Hemisphere since the 1970s. The olinguito had long been mistaken for its closest relatives, olingos—small tree-dwelling mammals that inhabit the lowland rainforests of South and Central America—however genetic research showed the olinguito had actually been separated by 3-4 million years from its cousins.
Trinidad and Tobago: a biodiversity hotspot overlooked
(08/26/2013) The two-island nation of Trinidad and Tobago in the Caribbean (just off the coast of Venezuela) may be smaller than Delaware, but it has had an outsized role in the history of rainforest conservation as well as our understanding of tropical ecology. Home to an astounding number of tropical ecosystems and over 3,000 species and counting (including 470 bird species in just 2,000 square miles), Trinidad and Tobago is an often overlooked gem in the world's biodiversity.
Zoo races to save extreme butterfly from extinction
(08/15/2013) In a large room that used to house aquatic mammals at the Minnesota Zoo, Erik Runquist holds up a vial and says, 'Here are its eggs.' I peer inside and see small specks, pale with a dot of brown at the top; they look like a single grain of cous cous or quinoa. Runquist explains that the brown on the top is the head cap of the larva, a fact that becomes more clear under a microscope when you can see the encased larva squirm. I'm looking at the eggs of a Poweshiek skipperling, a species that is more imperiled than pandas, tigers, or bluewhales. Once superabundant, only several hundred Poweshiek skipperlings may survive on Earth today and the eggs I'm looking at are the only ones in captivity.
Scientists discover teddy bear-like mammal hiding out in Andean cloud forests (photos)
(08/15/2013) While the olinguito looks like a wild, tree-climbing teddy bear with a cat's tail, it's actually the world's newest mammalian carnivore. The remarkable discovery—the first mammal carnivore uncovered in the Western Hemisphere since the 1970s—was found in the lush cloud forests of the Andes, a biodiverse region home to a wide-range of species found no-where else. Dubbed the olinguito (Bassaricyon neblina), the new mammal is a member of a little-known, elusive group of mammals—olingos—that are related to raccoons, coatis, and kinkajous. However, according to its description in the journal Zookeys, the olinguito is the most distinct member of its group, separated from other olingos by 3-4 million years (or longer than Homo sapiens have walked the Earth).
Meet Thor's shrew: scientists discover new mammal with a superior spine
(07/30/2013) In 1917, Joel Asaph Allen examined an innocuous species of shrew from the Congo Basin and made a remarkable discovery: the shrew's spine was unlike any seen before. Interlocking lumbar vertebrae made the species' spine four times strong than any other vertebrate on Earth adjusted for its size. The small mammal had been discovered only seven years before and was dubbed the hero shrew (Scutisorex somereni), after the name give to it by the local Mangbetu people, who had long known of the shrew's remarkable abilities.
Madagascar's rate of speciation slowing down
(07/16/2013) While Madagascar is famous for its incredible diversity of plants and animals, a new study suggests that the island's rate of speciation has slowed to a crawl.
Vocal-sac breeding frog possibly extinct
(07/02/2013) Somewhere in the wet pine forests of Chile, a male frog is gulping-up a bunch of eggs. No he's not eating them, he's just being a good dad. Darwin's frogs are known for their unique parenting-style: tadpoles are incubated in the vocal sac of the father. First recorded by Charles Darwin during his world famous voyage aboard the Beagle, the amphibians were common in the native Chilean pine forests until the last few decades. Now, scientists believe that one of the two species, the northern Darwin's frog (Rhinoderma rufum), may have vanished for good. And the other is hanging on by a thread.
Why bioluminescent fungi glow in the dark
(06/13/2013) Aristotle (384–322 BC) reported a mysterious light, distinct from fire, emanating from decaying wood. Pliny the Elder (23–79 AD) mentioned feasting on a glowing, sweet fungus found on trees in France and, in the late fifteenth century, a Dutch consul gave accounts of Indonesian peoples using fungal fruits to illuminate forest pathways. Bioluminescent fungi have intrigued generations of observers, and a handful of scientists still carry that torch of curiosity, answering questions about how and why these mushrooms glow.
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.
New insect discovered in Brazil, only third known in its bizarre family (photos)
(04/15/2013) A new species of forcepfly named Austromerope brasiliensis, was recently discovered in Brazil and described in the open access journal Zoo Keys. This is the first discovery of forcepfly in the Neotropics and only the third known worldwide. The forcepfly, often called the earwigfly because the male genital forceps closely resemble the cerci of the common earwig, remains a scientific enigma due to the lack of information on the family.
The Role of Science for Conservation - book review
(03/18/2013) The Role of Science for Conservation, edited by Matthias Wolff and Mark Gardner, celebrates Charles Darwin’s Bicentennial and 50 years of research by the Charles Darwin Foundation in The Galápagos, Ecuador.
Beyond the resorts: traveling the real and wild Dominican Republic (photos)
(01/29/2013) For its stunning variety of ecosystems, the Dominican Republic is like a continent squished into half an island. Lowland rainforests, cloud forests, pine forests, dry forests, mangroves, savannah, coastal lagoons, salt lakes, a rift valley, karst land formations, four mountain ranges—including the highest mountain in the Caribbean—and not to mention some of the best beaches, snorkeling, and scuba diving in the hemisphere can all be reached within just a few hours drive of the capital, Santo Domingo. Yet, bizarrely, most tourists who visit the Dominican Republic never venture out of their all-inclusive resort, missing out on some of the most stunning landscapes—and accessible wildlife viewing—in the Caribbean.
Scientists nearly double the number of biogeographic realms
(01/02/2013) In 1876, British biologist Alfred Russell Wallace published a map of the world that outlined how related animals were spread over the Earth. For example, Wallace was the first to publicize that North American biodiversity was substantially different from South America, and that an invisible line separated Southeast Asian biodiversity from that of Australia, New Guinea, and nearby islands. With Wallace's research came the founding of biogeography, or the study of species in relation to geography. Today, scientists with the University of Copenhagen have updated Wallace's map—nearly doubling the number of biogeographic realms—with support from data on over 21,000 species.
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.
Scientists create 'tree of life' mapping all known bird species
(11/02/2012) Scientists have created an evolutionary maps for all the world's nearly 10,000 bird species. The 'tree of life' is published in the current issue of the journal Nature.
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.
An interview with conservation writer David Quammen
(09/05/2012) David Quammen has done consistent and conscientious reporting from the trenches of ecological and evolutionary research for over thirty years now. Few in the world can claim as intimate and broad an understanding of conservation biology as he can. His books such as The Song of the Dodo and Monster of God match scientific and literary perfection. Nandini Velho and Umesh Srinivasan talk to him about the history of conservation science and what it can seek to create.
Bizarre new rodent discovered in Indonesia has only 2 teeth
(08/22/2012) The Indonesian island of Sulawesi is a workshop of bizarre evolutionary experiments. Think of the babirusa, pig-like species with tusks that puncture their snouts; or the maleo, a ground-bird that lays its eggs in geothermal heated sand; or the anoa, the world's smallest wild cattle. Now the island, made up of four intersecting peninsulas, can add another bizarre creature to its menagerie of marvels: the Paucidentomys vermidax, a new species of rodent that is different from all others.
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