Cogswell 1950 Empidonax hammondii 2 June 24 Ice Lakes, 3-3/4 mi. W, 1 mi. S Donner Pass, Glacier Co., Calif. about 5 heard calling (1+ full song) on a 2+ mile hike around the lakes in p.m. The forest is rather moderate density, mostly lodgepole pine, with firs in the more moist areas. ?? this sp. of course. July 1 to July 13 Sugar Bowl Lodge & "Cowgill meadow" areas (see above), 7000 ft, 1 or 2 heard (usually single "k'e-se' notes) on all trips into dense forest, & the fir clump of June 17 loss. July 19, July 20 2 heard giving a 2-noted "song" (k'e.sei, pseeet) from same forest & forest border areas. July 25 1 heard giving full 3-parted "song", others only 1 or 2 notes were Aug. Empidonax sp.? present in this area until at least 18th, but since they gave only the soft "pit" notes which all the species do, I cannot be sure of which they were. Aug. 25 7100 ft., 1/3 mi. S Donner Pass, Glacier Co., Calif. - 2 Empidonax sp.? calling "pit" from outer branches (at heights of 6 to 30 ft.) of firs & pines along ski trail where either this sp. or weightii.