J.G. Hall 1952 37 July 22 Sagehen Creek, 3 mi. NW Hobart Mills, Nevada Co., California to eat for 5 min. 8:18 fled finished eating, so pulled some dead sticks from shore and took them downstream. Almost immediately another had taken his place to take off more dead sticks. 8:23 one "materialized" in the cove & fed on willows for 5 min., then took away dead material. 8:30 yelling on spit, 8:35 adult appeared, cut willows in cove, bringing them to shallows before eating them. Cut more wil- lows which it took downstream & it (8:40). I left at 8:45 as it was getting too dark to see. Weather clear & calm as usual. July 23 Upper colony 3:50 PM. visited quail nest: all 10 eggs hatched. Upon seat 6:45 nothing till 8:35 when a yearling (?) ap- peared between house and dam, dove, surfaced & green stick which it noded into dam, then crawled over dam & disappeared. Reappeared a few sec- onds later & long cut willow which it carried back to dive into house with at 8:38. At 8:41 reappeared & went