Some frog species are adapted to a cold environment.

This is common among many frog species, and is of concern due to the much faster rate at which it can spread disease.

To add to the puzzle, a number of the area's other frog species vanished as well, and remain missing.

Cut down a forest, drain a wetland, build a shopping center, and the local frog species die.

Twenty percent of South America's frog species were named in that decade.

As researchers have long observed, the brightest frog species in nature are often the most poisonous, and for good reason.

However, populations of certain frog species are declining significantly.

In Malta this is the only native frog species.

In most places, it is the only frog species in the vicinity.

Unlike most frog species, it is often active during the day.