When glass frogs emerge during the rainy season, researchers at the Smithsonian Tropical Research Institute follow their migration out of the forest and along streams. These transparent leaf-lying ...

But looks can be misleading, so researchers tested the frogs’ DNA. Based on the results, they realized they’d discovered a “cryptic” new species: Zhangixalus nanshanensis, or the Nanshan ...

The calling animal turned out to be a new species. A team of researchers set out to study the hourglass tree frog, a “small, brightly colored species” found in Central and South America.

Intrigued, they took a closer look at the animals and soon realized they’d discovered a new species: Gracixalus weii, or Wei’s tree frog. A Gracixalus weii, or Wei’s tree frog. Photo from ...

They caught a few of these “large” frogs and, after taking a closer look, realized they’d discovered a new species: Minervarya ghatiborealis, or the Mahabaleshwar cricket frog. A Minervarya ...

In the gardens and parks of Toyota City, Japan, a small creature turned out to be a new species. Getty Images/iStockphoto To many across the islands of Japan, small tree frogs, or amagaeru ...