Cogswell 1950 JUNEO OREGANUS 1 June 17 near Sugar Bowl Lodge, 7000 ft., 1.2 mi. SSW Donner Pass, Calif. + other localities in Summit Valley W of SW of the Pass. Common in all forest border situations where shrub growth is not too dense, a few pairs being found well within dense forest wherever an acre or so of ground is open to the sky - even narrowly. Songs are frequent, even from males on territories still mostly snow covered. June 22 1 F incubating 4 eggs on a NEST sunk in a shallow pocket of the 1 ½ ft. high mud bank along the road leading thru forest to the lodge. The area is one where about 30 % of trees has been felled to open the road in spring - thus creating a narrow several-acre opening on either side of the road. [This nest robbed by unknown predator 2 days later] June 23 Bear Valley, 4585 ft., Nevada Co., Calif. - about 5 seen on 1½ hr. visit to Transition zone forest (with large black oaks) bordering broad grassy meadow. Apparently much less numerous here than at higher altitudes. June 24 W. end Donner Lake, 5940 ft., Nevada Co., Calif - 1 fledg. ling seen in dense lodgepole pine forest - the first noted in areas we cover (from here to Bear Val.). June 27 8800 ft., 2 ½ mi. SSE Mt. Rose, Carson Range, Washoe Co., Nev. Only 1 seen on ½ hr. walk thru subalpine forest still with many deep snowbanks. Trees are lodgepole, white bark & silver pines + mountain hemlocks.