Bowman 1952 Journal. 25. Aug. 25. 3 mi. S.W. Tres Piedras, 9000 ft., Rio Arriba Co., New Mexico. Temperature in shade at 6:25 A.M., 56.0°F. Clear cloudless from 6:30 AM - 8:15AM. Observed the following in a short walk on ridge NW of camp. Yellow pine, oak, aspen are the dominant vegetation. Steller Jay, hairy wood- pecker, Clark's Nutcracker, Pygmy Nuthatch, white-breasted Nuthatch, Mt. Chickadee, Collopy Hummer, West Bluebird, Audubon Warbler. Warblers were everywhere to be heard, and moving rapidly in a southward direction. Pygmy Nuthatches although still abundant, seemed less noisy today. As usual they were found most commonly in the yellow pines, & occasionally in the oaks. Fresh Pocket Gopher digging found at the base of oaks in fairly loamy soil. Soil is very shallow-- no more than 6" deep where sampled once. Gravel & boulders beneath this. The following temperatures were taken. Species Temp. °C Time Conditions Audubon Warbler 42.1°C 10:00 AM dead 2 sec. Pygmy Nuthatch 38.4°C 6:48 AM olive " 41.6°C 6:45 AM dead 5 sec. " 41.6°C 10:15 AM dead 5 sec. " 41.7°C 1:45 PM dead 5 sec. " 41.6°C 1:45 PM olive " 41.6°C 1:45 PM dead 2 sec. " 41.9°C 1:45 PM dead 3 sec. " 42.0°C 1:50 PM dying.