1994. Why are tropical birds like parrots and quetzels so much more colorful than temperate bird species? How can a vulture soaring thousands of feet above the canopy spot a dead mouse on the rain forest floor? Hilty, zoologist and leader of birding tours throughout South and Central America, offers an interesting, lively discussion of these and other matters touching on rain forest bird communities, migration, courtship rituals and nesting habitats, feather color and patterns, foraging techniques and song patterns. Annotation copyright Book News, Inc. Portland, Or.