Some harlequin frogs have lost their poison—and their ability to defend themselves. Scientists are on the case.

The phantasmal poison frog, Epipedobates anthonyi, is the original source of epibatidine, discovered by John Daly in 1974. Epibatidine has not been found in any animal outside of Ecuador, and its ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. A new species of poison dart frog has been discovered in the heart of ...

Scientists have identifiedtwo new species of poison dart frogs in the remote Brazilian Amazon, shedding light on the hidden biodiversity of this vast rainforest. Published recently in ZooKeys andPLOS ...

This newly discovered poison frog may represent an evolutionary step on the pathway towards developing brilliant warning coloration associated with other poison dart frogs. A small reddish-brown frog ...