Book excerpt: An essential book for all bird and wildlife buffs visiting the Grand Canyon. ÑWildlife Book Review "Will benefit all amateur naturalists because of its survey of the life zone patterns in [the] southwestern United States." ÑScience Books & Films "The subtitle accurately reflects the contents of this excellent book on the birds of a unique natural wonder and national treasure. . . . An annotated checklist discusses the status and abundance of each of the over 300 species of birds known to have occurred in the Grand Canyon region, which is defined here as the river between Glen Canyon Dam and Lake Mead and the contiguous plateaus to the north and south." ÑJournal of Arizona History