Click on the images to see them full-sized.
Pacific Treefrog (Hyla regilla), courtesy of Jef Poskanzer.
"It's a photo I took a few years ago at Sea Ranch in northern California. The frog was just sitting there on an old fence, in the middle of a field of damp grass."
Yet another picture of a red-eyed tree frog (500K).
A coqui (136K), a small tree frog that lives in Puerto Rico (its name comes from the sound it makes). The picture is from the Puerto Rico page image collection.
Pine Barrens Treefrog (74K). Animals Animals photo by Zig Leszczynski. (c) 1994 National Wildlife Federation
Spring Peeper (50K). (This frog makes a peep-peep sound.) Photo by John Shaw. (c) 1994 National Wildlife Federation