Since the establishment of the Nevada Test Site (112 km NW of Las Vegas) in 1950, there has been only one comprehensive study of the birds in its 3,500 km². Hayward et al. (1963) published the first report, which resulted primarily from the collection of 900 specimens. More recently, the birds in a Larrea-Ambrosia community of southwestern NTS have been well documented by Herbert O. Hill (1971, 1972, 1973) under the International Biological Program/Desert Biome studies. The nature of work carried on here by the Energy Research and Development Administration (ERDA) makes it impossible to allow unrestricted access to ornithologists.