Nestled in a valley between two volcanoes, Donald Varela-Soto heard something unfamiliar. For six months, he searched for the source of a shrill frog call along the edge of a wetland in Tapir Valley Nature Reserve, a former cattle ranch in northern Costa Rica. “I kept hearing this different sound in the wetland but was … Continue reading Tiny new tree frog species found in rewilded Costa Rican nature reserve