After keeping scientists in the dark for decades, the supposedly extinct Omaniundu reed frog (Hyperolius sankuruensis) recently revealed itself again with a nighttime call, conservationists say.
University of Copenhagen student Jos Kielgast rediscovered the frog species about 185 miles (300 kilometers) from where it was first found in 1979 in a remote forest of the Democratic Republic of the Congo. (See a drawing of another lost frog species in Congo.)
The new hunt for missing amphibians such as H. sankuruensis should be applauded, Jason Rohr, a University of South Florida ecologist not involved in the project, told National Geographic News in August.
"But I also discourage anyone from interpreting any new discovery of these species as previous scientific error or evidence that the particular species, or amphibians in general, have not 'croaked,'" he said by email.
"While a few remaining individuals or isolated populations is certainly better than a complete extinction, this would unfortunately be a small victory considering the catastrophic, global loss of amphibians."
(See more photos of aquatic species.)