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36 PACIFIC COAST AVIFAUNA No. 14 



33) ; and Teton County (Saunders, l!)Ua, p. 128). I?rol)al)ly ])reeds at Flathead 

 Lake (Silloway, 1901a, p. 39). Breeds at Big Lake (Thomas, MS). 



Reported as a migrant in Fergus County (Silloway, 19()3a, p. 13) and in 

 the Bitterroot Valley in fall (Bailey, ]\IS). The only migration vlates are Terry, 

 average April 1, and earliest March 10, 1902, and Great Falls, average Mareli 



16, and earliest March 10, 1889 (Cooke, 1906a, p. 39). A winter record is Clio- 

 teau, December 27, 1912 (Saunders, 1914a, p. 128). 



33. Aix sponsa (Linnaeus) 



Wood Duck 



Rare. Recorded from but six localities, as follows : Taken in spring and 

 fall at Fort Custer by Capt. :\Iix (McChesney, 1879, p. 2394). Brood seen a1 

 Flathead Lake, and young male taken July 31, 1901 (Silloway, 1901a, p. 39). 

 Gallatin County, migrant and breeds in mountains, according to Cooley (Saun- 

 ders, 1911a, p. 33). Bitterroot Valley, one male captured alive near Corvallis 

 in the fall of 1915 (Bailey, MS). Two ol)served on tlie Yellowstone near Billings 

 in 1912 by C. S. IMacFarland, who was familiar with this species in the cast. The 

 birds were observed at close range for ten minutes (Thomas, ]\IS). 



34. Marila americana (Eyton) 



Redhead 



A rather uncommon migrant, principally in the eastern part of the state. 

 There are no records west of the continental divide. There are no definite 

 breeding records, and only one case of its occurrence in summer, in Gallatin 

 County, June 29-30, 1909 (Saunders, 1911a, p. 33). .Migrant records are Fort 

 Keogh (Thorne, 1895, p. 212), Custer and Dawson counties (Cameron, 1907, }). 

 249), Fergus County (Silloway, 1903a, p. 14) and as l)elow. 



Migration dates: Terry, September 26, 1903 (Cameron, 1907, p. 249); 

 northern Montana, average April 13, and earliest April 7, 1895 (Cooke, 1906a, 

 p. 42); Choteau, April 17, 1912, and September 13, 1911 (Saunders, 1914a, p. 

 128) ; and Helena, April 9, 1911. 



35. Marila valisineria (Wilson) 



Canvasback 



A migrant in numy localities in the state, but evidently not common. 

 Breeds in the vicinity of Malta, nine eggs being secured June 19, 1903, and a 

 nest found June 28 (Willett, 1907, p. 105). Breeds in the Lak(> Basin of Yel- 

 lowstone and Stillwater counties (Thomas, MS). 



Recorded as a migrant in Fergus County fSilloway, 1903a. p 14'), (lallatiu 

 County (Saunders, 1911a, p. 33) and as below. 



^Migration dates: Corvallis, October 15. 1911 (Baihy, ^IS) ; Choteau, April 



17, 1912, and November 24, 1912 (Saunders, 1914a, p. 128) : Helena, Api'il !>, 

 1911; Kalispell, October 21, 1917 (Sloanaker, MS). 



Occurs on Flathead Lake in winter, until the lake freezes over, sometimes 

 until late in January (Sloanaker, MS). 



