1921 BIRDS OF MONTANA 67 



nest in the latter part of July. I have seen young on the wing in Powell County, 

 July 31, 1910; in Teton County, July l-t, 1912; and near Belton, Glacier National 

 Park, August 3, 1914. 



^Migration dates are ratlicr variaitle From year to year. Cameron iiivcs tlii' 

 I'nd of March and middle of October as times of arrival and departui'c in Custer 

 and Dawson counties (1907, p. 267). Other dates ai-e as follows: Spring: 

 Lombard, April 22. 1909; Big Hole River, April 27. 1910; French Gidch, Deer 

 Lodge County, .May 5. 1911 ; Teton County, May 19, 1912 (Saiuiders, 1914a, p. 

 182); Bitterroot Valley. Frbrnai'y 2S, 1910, March 27. 1911, Ai)i'il IS. 1912. 

 and March 29, 191.3 (I'.ailey, MS); llighwood, April 3, 1914 (Duliois, MS.. 

 Fall: P.ozeman, October (1, 190S; Race Track. Deer Lodge County, Septembci- 

 25, 1910; Whitetail Park, Jefferson ('ouuty, September 26, 1909; Teton Counly, 

 Septcmlicr 2S, 1911 (Saundei's, 1914a, p. 132). 



126. Pandion haliaetus carolinensis (Oimdin) 



OSPREY 



A regular and formerl.y (■o)nmon snmmi'r resident of the westcru half of 

 the state, along streams and near lakes, occurring also along tin- lai'gcr rivers 

 eastward. .Most observers in the eastern half of the state do not list this s|)ecics. 

 It breeds regulai'ly at Flathead Lake, and probably rarely all tlirough the moun- 

 tainous half of the state, as there are scattered summer records throughout this 

 i-egion. At Flathead Lake old nests testify to its former abundance, bul now 

 there are onl.y a few pairs still breeding on some of the islands. 



The only date for nesting is from Flathead Lake, a nest containing young, 

 June 14. 1900, .voung still in this nest on August 6 (Silloway,, 1901a, p. 30). 

 Other localities for sunnner rccoi^ds ;ire Gallatin County (Richmond and Knowl- 

 ton, 1894, p. 303); Park County; Big Hole Basin (Forrest, 1914, [). 194); 

 Bitterroot Valley (Bailey, MS); Belton, August 3, 1914. Records east of tli.' 

 mountains are from the IMissouri River above (Carroll (Grinnell. 1876, p. (15(1) ; 

 between Billings and Miles City (Jones ami Dawson. 1900. p. 32) ; Fergus 

 County (Silloway, 1903a, p. 33). 



Migration dates are as follows: Sjuing: Fridley, Park County. ^lay 1 '., 

 1909; Big Hole River, May 1. 1910 (Saunders. 1912a. ]). 25) ; Teton Rivei-. May 

 19, 1912 (Saunders, 1914a, p 132); Bitterroot Valley, A])ril 17. I!)!! (Bailey, 

 MS). Fall: Belton, October 2, 1915 ( DuBois, MS). 



127. Asio wilsonianus (Lcss(ui) 



L()N<i-io.\HEO Owl 



A regular peruument resilient evidently throughout the state. Most of the 

 nesting records are east of the mountains, but the bird evidently nests wi-st of 

 them also, and occurs at considerable elevation in the luountains. Wiutiu- ree- 

 ords are all from eastern .Montana, but it is not unlikely that the bird is resi- 

 dent wherever found. 



Nesting records: Custer County-, female found dead on si.\ eggs, Ma.v 7. 19(17 

 (Cameron, 1908a, p. 5()) ; nesting at ito/.eiiian (Saund^i-s, IDlla. p. 37); Lewis- 



