More than 20 new frog species were identified during Conservation International’s expedition.
Living nearly 100 feet above the forest floor, this frog was more often heard than seen. During the night, the males of the species would emit loud, croaking noises. The individual pictured here is actually the only one the researchers were able to see.
DNA analysis is still needed to confirm whether this amphibian is in fact a new species.

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Lizards get a bad rap when it comes to their families: They lay their eggs and never look back. But that’s not the case for desert night lizards, which have been found investing time and energy in their young and forming families — a strategy that was thought exclusive to mammals and birds.

«Birds, mammals and reptiles are so different in so many ways,» said Alison Davis, a postdoctoral researcher at the University of California at Berkeley. Reptiles aren’t even warm-blooded, she notes, yet here they are forming families just like their warmer cousins.

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The tracks, described in a report published Wednesday by the journal Proceedings of the Royal Society B, push back the first appearance of this dinosaur lineage to about 250 million years ago.

“They are the oldest fossils of the dinosaur lineage of any type anywhere in the world,” said Stephen Brusatte, a graduate student at Columbia University and lead author of the journal article.

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As he ventured into the forests of Chocó, a mountainous region in western Colombia, Conservation International (CI) Amphibian Conservation Officer Robin Moore wasn’t feeling very optimistic. As part of CI’s Search for the Lost Frogs, his small team of herpetologists was on the hunt for four species of amphibians that hadn’t been seen in at least a decade. But after spending the previous two days and nights sifting through leaf litter on steep mountain slopes in nearby Sonsón, not only had the researchers not seen any traces of these species – they had found almost no animal life at all.

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