62 PACIFIC COAST AVIFAUNA No. 14 



111. Astur atricapillus striatulus Ridgway 



Western Goshawk 



Summer resident in the mountainous half of the state. Tlie Gosliawk ha.s 

 been found in the breeding season in Gallatin County (Saunders, 1911a, p. 36), 

 in Lewis and Clark County (Saunders, 1914a, p. 132), and in the Big Hole 

 Basin, where a nest and four young were found June 1, 1913 (Forrest, 1914, [). 

 194). In the last ease the birds were definitely identified as belonging to the 

 western race, but in the other cases the birds may have been of either race. 



Goshawks are reported to be rare winter visitors in the Bitterroot Valley, 

 where they are probably of the western race (Bailey, MS). Kalispell, one, Sep- 

 tember 22, 1917 (Sloanaker, MS). 



112. Buteo borealis krideri Iloopes 



Kridee Hawk 

 Seen lietvveen Billings and Miles City, August 13, 1900 (Jones and Dawson, 

 1900, p. 32). Nests at Toluca, Big Horn County, where a specimen was taken 

 in ilay, 1918 (Thomas, MS). 



113. Buteo borealis calurus Cassin 



Western Red-tail 



A common summer resident, found throughout the state, but evidently most 

 abundant in the mountains of the western half. In the Canadian zone of thi' 

 mountains it is the only common hawk. Reported to breed in Caster and Daw- 

 son counties (Cameron, 1907, p. 262) ; Fergus County (Silloway, 1903a, p. 29) ; 

 Flathead Lake (Silloway, 1901a, p. 46) ; Gallatin County (Saunders, 1911a, p. 

 36) ; southwestern Montana (Saunders, 1912a, p. 25) ; Big Hole Basin (Forrest, 

 1914, p. 194) ; Belt Mountains (Williams, 1882a, p. 63) ; Teton County (Saun- 

 ders, 1914a, p. 132) ; Bitterroot Valley, rare (Bailey, MS). A nest and two eggs 

 reported between Forts Union and Benton, June 18, 1862 (Cooper, 18691), p. 

 295). No other definite dates for nesting are available, but I have found tlie 

 nests twice in June, in the Sixteen Mile Canyon, Gallatin County, in 1909, and 

 near Bernice, Jefferson County, in 1911, when it w-as impossible to ascertain 

 whether they contained eggs or young. These nests, and others that I have lo- 

 cated in the Sun River country, were built on rock cliffs, and I believe this spe- 

 cies nests more frequently in such situations than in trees in western Montana. 



Migration dates: Sedan, Gallatin County, April 1. 1909; Silver Bow 

 County, April 5, 1910; Brackett Creek, Gallatin County. October 12, 1908; 

 Three Forks, October 17, 1909; Deer Lodge County, October 9, 1910 (Saunders, 

 1912a, p. 25). 



114. Buteo swainsoni Bonaparte 



SwAiNsox Hawk 

 A conimon summer resident on the prairies and in the mountain valle.vs 

 tiiroughout thi' state. Repoi'ted by nearly all oliservcrs, and from all regions 



