66 PACIFIC COAST AVIFAUNA No. 14 



122. Falco columbarius columbarius Linnaeus 



Pigeon Hawk 

 A rai'o .suinincr resident locally in the mountains, oeeurring in fall migra- 

 tion in parts of the valleys. The. status of this subspecies in its relation with 

 the next in this state is not clear. This form has been found in the breeding sea- 

 son at Flathead Lake (Silloway, 1903b, p. 302). There are a number of records 

 for eastern Montana, most of them in late summer and fall. There are no records 

 later than 1902, perhaps indicating that the species is decreasing. Custer and 

 Dawson counties, common fall migrant ; August 20, 1899, an,d September 5, 1899 

 (Cameron, 1907, p. 267). Lewistown, October, 1902 (Silloway. 1903a, p. 32). 

 Yellowstone River in September (Allen, 1874. p. 64). Big Horn ^lonntains, 

 August 27 (McChesney, 1S79, p. 2391). Abundant along streams (Hayden. 

 lS(i2, p. 152). 



123. Falco columbarius richardsoni Ridgway 



RiCHAEDsoN Pigeon' Hawk 

 A rare suunner resident of northwestern Montana, also occurring in various 

 other parts of the state in fall migration. Summer record : Taken July 26, 

 1902, at Swan Lake (Silloway, 1903b, p. 302). Migration records: Bridger 

 .Mountains, September 5, 1874 (Grinnell, 1876, p. 649) ; Madison River, Sep- 

 tember 23, 1888 (Richmond and Knowlton, 1894, p. 303); two taken at Fort 

 Keogh in fall of 1889 (Thome, 1895, p. 214) ; Dawson County, August, 1904 

 CCameron, 1907, p. 267). I observed a bird that belonged to this species, but 

 to which subspecies I could not be sure, ;it Flathead Lake in July, 1915, indi- 

 cating that the species still breeds there. 



124. Falco sparverius sparverius Linnaeus 



Eastern Sparrow Hawk 

 Birds referable to this form occiir in eastern Montana (Mearns, 1893, pp. 

 252-270). A specimen from Miles City, taken by C. F. Hedges, September 24. 

 1900, is referred to this subspecies. It is no. 5389 coll. of L. B. Bishop. The 

 valitlity of the western race of this species has been questioned, but until tlie 

 (|U('stion is settled Iwth ra('(\s must be listed fi'om Montana. 



125. Falco sparverius phalaena (Lesson) 



Desert Sparrow Hawk 



An abundant summer resident practically throughout the state, occurring 

 chiefly in the prairie regions and mountain valleys, but also found in the lower 

 mountain canyons up to the lower Canadian zone. It is somewhat less common 

 along the northern border of the state, just east of the continental divide. Except 

 in this region, where the Marsh Hawk exceeds it in numbers, it may be said to 

 be the commonest Montana hawk. All observers record this species from all 

 parts of the state. 



In spite of its abundance there are no definite datts of finding of nests on 

 r(>cord. The liii'd nests vei-y commonly, antl young may be seen just out of the 



