Red-Eyed Tree Frog
A red-eyed tree frog, Agalychnis callidryas, peers at the camera at the Sunset Zoo in Manhattan, Kansas. The species may have developed its vivid scarlet peepers to shock predators into at least briefly questioning their meal choice.
13 Gorgeous Pictures Remind Us Why Frogs Need Our Help
Found from the Arctic to the Amazon, frogs are highly adaptable—but habitat loss and disease are silencing species worldwide.
Hopping the Earth for a whopping 190 million years, frogs have figured out how to adapt to just about any climate imaginable.
If there's water, there will be frogs, and there are roughly 4,740 known species, which live on every continent except Antarctica. For instance, the wood frog, which lives north of the Arctic Circle, can survive being frozen alive. Their hearts and lungs stop functioning for up to weeks at a time, until they eventually thaw out and return to normal.
Hardy as they are, frogs are also vulnerable to changes in their environment. That's because, when submerged, the aquatic creatures breathe through their thin, permeable skin, which makes them susceptible to shifts in water temperature and pollution. (See "
