Cogswell 1950 Euphagus cyanoccephalus - 1 June 17 - Lake Van Norden & vicinity, 6800 ft, Glacer & Nevada Cos. Calif. off. Numerous (probably several dozen pairs) on large open meadow with open lodgepole pine forest adjacent. June 17: Bear Valley, 4950 ft, Glacier & Nevada Cos. Calif. Several seen in broad grassy meadow surrounded by pine, incense cedar, white fir, and black oak forest. June 20 - Lake Van Norden (see above) - adults carrying food, appar- ently to young still in nests; but the actual nests not seen, because of my duties as group leader. June 23 Bear Valley (see above) - 20+ seen in 1 1/2 hr. visit. June 25 Sierra Valley, 4900 ft., Sierra Co., Calif. - Common about farm buildings & on nearby wet grassland & sagebrush areas. Several NESTS were found on rafters of buildings of a ranch near center of valley, no trees being available except a few cottonwoods? Two nests I was able to reach both held eggs. June 26 Lake Van Norden - see copy of original field notes of 3 audubon campers who observed behavior of colony of adults near young out of nest. July 6 about 20 flew in to mob a Sparrow Hawk on the ground after it had a broken wing, apparently from hitting a telephone wire. They were gathered closely around the hawk, which was on its back, all calling vociferously, with one or two at a time flying up & making short passes & striking it. (I rescued the hawk). July 7 Bear Valley (see above) - fledglings out. July 9 S end Lake Tahoe, 6230 ft. Eldorado Co. Calif. Numerous in open forest adjacent meadow.