KILBUCK AND AHKLUN MOUNTAIN BIRDS 



47 



were independent beginning on 21 August 1977 and 26 August 1974. 

 Nine broods averaged 2.8 young (range, 2-4). One nest with eggs was 

 deserted after logging activities began nearby, and another lost young by 

 predation, possibly by a lynx (Lynx canadensis^. No goshawks were seen 

 on the Tuluksak River in June-July 1983 following the sharp decline in 

 the snowshoe hare population in 1982. Goshawks were nesting again in 

 1986 (C. Clark, Jr., personal communication). 



Adult goshawks at the Tuluksak River had typical A. g. atricapillits 

 markings on their head and underparts, except for a breeding female in 

 1979 that was strongly leucistic. Leucism seems not to have been pre- 

 viously recorded in^l. ^. atricapiUus but is common in the east Siberian 

 A. g. albidus (Brown and Amadon 1968). 



Sixty-three food items were found at nests on the Tuluksak River: 

 12 varied thrushes (Ixoreus naevius}, 10 ptarmigans (Lagopm spp.), 

 10 unidentified small passerines, 8 snowshoe hares, 5 arctic ground 

 squirrels (Spermophilus parryit), 5 gray jays (Perisoreus canadensis}, 

 4 spruce grouse (Dendragapus canadensis}, 4 American robins (Turdus 

 migratorius} and thrushes (Catharus spp.), 1 red squirrel (Tamiasciu- 

 rus hudsonicus), 1 northern pintail, 2 goldeneyes, and 1 fox sparrow 

 (Passerella iliaca). 



Fall migrants were seen at Cape Peirce in 1970 (7 August) and 1976 

 (28-30 August, 6-7 September). At the Tuluksak River juveniles were 

 seen until 1 5 October and adult goshawks were present in winter. 



Swainson's hawk {Buteo swainsont), VRv. 



Three birds were seen at Cape Peirce in 1973— one light phase on 

 4 May, one dark phase on 6 May, and one dark phase on 13 May. 



Red- tailed hawk (Buteo Jamaicensis). VRsr. 



Red-tailed hawks nested at the Tuluksak River in the late 1950's and 

 early 1960's (C. Clark, Jr., personal communication), but we saw none 

 there. We found an adult B.j. harlani type and a juvenile on the lower 

 Salmon River on 9 August 1979. D. A. Boyce and S. J. Fristensky (unpub- 

 lished) reported two red-tailed hawks in July 1984 on the lower KisaraUk 

 River just outside our area. 



Rough-legged hawk (Buteo lagopus), Csr, Rfm (30 April- 10 Octo- 

 ber). 



Rough-legged hawks commonly nested along the coastal portion of 

 the study area and locally inland. We saw birds in some years at the 

 Salmon and Tuluksak rivers, and they nested each year at the Kisaralik 

 River. Breeding or probably breeding birds were also found at the Eek 

 River (R. Baxter, unpublished). Rough-legged hawks were seen at Kagati 



