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 ...

Some of nature’s most vibrant colors occur in frogs, who peek out from rainforests and marshes in startling shades of blue, yellow and red. But for hundreds of species, only males flaunt flashy colors ...

Smithsonian scientist teams up with international collaborators to understand why these male frogs are 'blushing' when it comes to sex Some of nature's most vibrant colors occur in frogs, who peek out ...