1. Cade 1958 Buteo lagopus 23 July Cont Aerie #6: pair of light phase birds on the lower Killek Bluff - Nest 10 ft below brink of alder brush slope, 4650 ft above top of a talus and 150 ft above the water. Four young - oldest with primaries 6" x tail 4-5" - youngest with primaries 5" x tail 3". No fresh kills in nest - pellets collected. Nest about 250 yds down river from puegvine. -by bluffs or right limit - first below Killek - a single adult was seen but no active nest could be found. Aerie #7: pair of light phase birds on the double Knife blade bluff - Nest on the upriver blade - 25 ft down from the crop-off at the end of the ridge, 150 ft sheds drop to the river below. Nest only about 30 yds from puegvine aerie. Two young about 3 weeks old. Numerous of fresh prey in the nests. On the series of small outcrops on the right limit below double-Knife, where rough-legged nested in '62-37, a single adult F was seen but no active nest present. 24 July Colville River - from 1 mi below Double K to ca 20 mi above Unicat.