Except for some introductory material on anatomy and a closing chapter on unusual breeding habits, this leisurely introduction to the world's anurans proceeds species by species, noting along the way unusual habits and adaptations--particularly coloration, which seems to be Simon's special interest. The prose--often redundant and overwrought in praise of ""attractive colors, musical voices, acrobatic talents, elfin proportions"" and other ""exquisite"" frog attributes--is offset somewhat by the appeal of Simon's luminous illustrations. Supplemental.