Cogswell 1950 Sphyrapicus thyroideus June 21: lower end of "Sugar Bowl", 1 1/2 mi. SSW Donner Pass, Placer Co., Calif a pair flew thru dense fir & pine forest near creek. The ♀ went on after a short, tortuous chase thru the lower parts of 2 trees; but the ♂ alighted on the trunk of a fir close to my class of 7 people. He gave a nasal squealing call - not so long as the similar one of S. varius. June 24 NE base Crow's Nest Pk., 1 1/2 mi. SW Donner Pass, Placer Co., Calif. a ♂ flew thru dense red fir - lodgepole & white pine forest, giving this same call as he alighted on the trunk of a tall fir some 40 ft. up. June 29 (a.m.) 7100 ft., 1/3 mi. S Donner Pass, Placer Co., Calif - a ♂ flew from near Mary L. into stand of tall firs on W-facing slope. (p.m.) Ice Lakes Camp Yrd., 6900 ft., 3+ mi. W, 1 mi S Donner Pass, Placer Co. Calif - a ♀ seen returning to a NEST tree twice. The nest hole was discovered on June 20 by Bird Ruth, who saw both birds go to it then. It is about 60 ft. up in the dead, spire top of a lodgepole pine. The ♀ worked her way around the tree so adroitly that today I did not see her go into the hole; but it is the only fresh looking hole of ♀ which are in that tree. The second time (about 4:30 p.m.) she was foraging on 15-20 ft. high lodgepoles just E of Oulzura L. (one of the "Ice Lakes") & flew several hundred yards to the nest area. The forest in the area is a mixture of a few very tall, old red firs & lodgepole pines & many younger trees from seedling to 70 ft. height, the lodgepole predominating.