I camped at Teal Lake in the Park Range to photograph fall colors, but I also enjoyed the ospreys that were hunting trout and the numerous leopard frogs at the lakeshore. Teal Lake is like many other ...

Q. You once wrote that blue pigment is not known to exist in any terrestrial or freshwater animals with backbones. I found a blue bullfrog in a marsh in Virginia. It was mostly blue with some gray ...

Recently I visited a wonderful place called the Cape County Conservation Nature Center. While there I photographed these two complacent frogs. The frog on top is a gray tree frog. The one it is ...

What explains the vivid colors of the strawberry poison-dart frog? Piotr Naskrecki / Minden Pictures In the animal world as in fashion, bright color makes a bold statement. The vivid hues of the ...

Recently I had an opportunity to take pictures of green frogs at eye level. Green frogs (Lithobates clamitans) are a common frog here in Pennsylvania. They usually hang around ponds, lakes, ...

While poking around the garden the other day I found an adorable visitor. A small frog called a gray tree frog (Hyla versicolor) resting among the brightly colored flowers. This amazing little ...

The through-and-through greenness of hundreds of frog species that can be found deep in their lymphatic fluid, soft tissues and even bones, comes from a clever biochemical workaround that combines a ...

In a remote part of Australia, researchers recently stumbled upon an unusual, blue-skinned tree frog. This individual is a rare genetic mutant of the magnificent tree frog, a large amphibian that’s ...