1921 BIRDS OF MONTANA 79 



tains. Hybridizes with the next species so that ])irds are seldom typical. The 

 following reeords of this species have been published: Seen west to the Mussel- 

 shell (Allen, 187(1, p. 62); occasional on the Little Horn River (i\IeChesney, 

 1S7!), p. L':!i)l ) ; upper .Missouri (Haird, 1S58, p. 119) ; one taken August 23, 1874, 

 at base of Rocky JMountains (Coues, 1874b, p. (il8) ; Gallatin County, not <'om- 

 nion (Saunders, lOlla, p. 38) ; Divide ('reek. Silver How County, April 17, 11)10 

 (Saunders, 1912a, p. 2(i) ; conuuon siuiuner resident, nesting, Custer and Daw- 

 son counties (Cameron, 191)7, p. 270). 



ir)9. Colaptes cafer collaris Vigors 



Red-shafted Flickek 



A very conuuon sunuuei' resident throughout the state. East of the conti- 

 nental divide the iiiajorit.y of bil'ds are h,ybrids with the hist mentioned species 

 ((J. aui-aitis lHt( t(s), but luost of such hybrids are nearer collaris than liiteus. 

 West of the divide the ma.jority of birds are typical collaris. AH observers rec- 

 ord this species as very common, and it is on the whole the commonest and most 

 widely distributed woodpecker in the state. It breeds mainly in the Transition 

 z(uu\ in the cottonwood groves of the prairies and valleys, in the pine hills of the 

 e.isteru half of the state, and on the lower mountain slopes of the western half. 



The migrations evidently take place in March or early April, and in Xoveui- 

 ber. It is difficult to determine dates exactly because a few individuals winter 

 not uncommonl.y. Dates of arrival are: Bozeman, April 2, 1909; Silvei' IJow, 

 .March 29, 1910; Bozeman, March 19, 1911; Choteau, April 7, 1912; Lewistown, 

 March 30, 1901 (Silloway, 1903a, p. 36) ; Highwood, April 7, 1914 (DuBois, MS). 

 The only fall dates I have are from Bozeman, November 5, 1908, and Three 

 Forks, October 17, 1909. 



This species winters in siuall numbers in the western half of the state, and 

 evidently quite regulai-ly west of the divide. 1 have noted it in winter at Living- 

 stone, Lombard, and Choteau. West of the divide it is reported as conuuon in 

 the Jiitterroot Valley in winter (Bailey, MS), and it is reported from .Missoula, 

 December 25, 1915 (Kittredge, 1916, p. 39). 



This bird nests very commonly, but, as is true with some other conuuon s|)e- 

 cies, dates of finding of nests or taking of eggs have not been put on recoi'd 

 Young were hatching on June 28 in the Belt ilountains (Williams, 1882a, p. (i:!). 

 A nest containing nearly full-grown young was found at Flathead Lake in late 

 July, 1915 (Saunders, 1916b. p. 82). 



160. Phalaenoptilus nuttalli nuttalli (Audubon) 



POOK-WILL 



A common suuuuer resident of extreme eastern ^lontana, aiul occurring 

 westward in the mountains, but much rarer there. One rec(U'd west of the con- 

 tinental divide. Seen along the Musselshell (.\llen, 1.S74, ji. (i2); Yellowstone 

 River, August 8, 1856 (Baird, 1858, p. 150) ; Big Horn Mountains, heard (Mc- 

 Chesney, 1879, pp. 2389-2390) ; Fergus County, in uu)uutains to 7000 feet (Sillo- 

 way, 1903a, p. 37) ; Custer and Dawson counties (Camei'ou, 1907, p. 3,8!)) ; Calla- 



