W. Riewer 1950 Journal 14 Mar. Taxos; Hudspeth Co., 10 mi. W Eagle Peak various sparrow-like birds. Howard took a white-breasted nuthatch. No pyrrhuloxia, our goal, were seen. For brief description of area see 12 Mar. Journal. To be added in fact that wash flanked on both sides by extensive areas of creosote bush. By midmorning we were returning to El Paso to pick up Pitelka who would be returning from business in Mexico City. 19 Mar. Mexico: Durango: On evening of 16 Mar., we passed finally through customs and proceeded toward Chiapas with dispatch. On that might we camped, to sleep only, in an extensive grassland area perhaps 100 mi. N of Chihuahua City. Prior to that point most of the terrain was truly desert as in adjacent Texas. On 17 Mar., after driving all day, camped in arid mountains about 120 mi. N of Hidalgo de Parral. Reached Durango in early afternoon of 18 Mar. and during afternoon took side trip toward Mazatlan to point 3 mi SW El Salto, Durango. Objective: to sample bird population, especially jays, in conifer zone of Sierra Madre Occidental. Camp setup in conifers, 8400 ft. near large stream. Area in use as stock range and greasy areas (dry) well trampled. At night heard a horned owl but took nothing