A comprehensive photographic guide to 300 commonly encountered and unusual species of birds, mammals, reptiles, amphibians, butterflies and moths, and other invertebrates. With a good overview of the geographic setting and natural history of the region, literature cited, descriptions and detailed distribution maps for each species, 345 color and 75 black-and-white photographs and 273 maps. Henderson, a wildlife biologist, is a popular tour leader in Costa Rica. An excellent (if hefty) resource for the traveler.  (CRC27, $39.95)