1921 BIRDS OF MONTANA 65 



overlu'ad, evidently iiiig'rating, I'or they were all t'lyiiiij southeast against a sti'oii^' 

 wind. 



The only specimen definitely identified as to siilispecies. so far as 1 know, 

 is one from the South Foi'k of the Flathead lliver (Saunders, ll)14a, [). VV2). 



119. Falco rusticolus rusticolus Linnaeus 



Gray Gyrfalcon 



()ni' record only. One seen at Collins. Teton ('ounty, January S. 1012 

 (Saunilers, IDUa, p. IMl'). 



120. Falco mexicanus Schle^-el 



1 'ram; IK Falcon 



A rather rare permanent resident thi-oni;hont the state. Ai)parently only 



a snnnner resident in most places. Records west oi' th mtinental divide are 



few. 



Sumnu'i' and nesting- reeoi'ds: Two Foi'ks of the Mill; Hiver, nest and young, 

 July IS, 1874 (Coucs, 1S741), pp. 6'J1-G2l2. and lS74a. p. 'm:>) : Cone I'.utle, in 

 Judith Mountains, not comiiKin ((ii'innell. 1S7G, p. 64!)); various localities 

 along the Upper Missouri ( liayden, lS(i2, p. l.")2): sevei'al specimens from the 

 Upper .Missouri and Yellowstone (liaird. IS.IS, ]i. 12); Custer County. |Mrma- 

 nent resident, nesting in the hadlauds, I wo eggs .May 10. PKIC (Cameron, l:ill7, 

 pp. 26r)-266) ; Gallatin Connt.x'. rare summer resident (Saunders. lOlla. ji. 'Mi) : 

 Gold Creek, i'owell County. July-August, IDKI (Sainidei's, l!)12a, p. 2.')); Teton 

 Count.v, summer I'csident on |u-airi<'s (Saiuiders, l!ll4a, p. Ui2); Wild Iloi'se 

 Island, Flatlu'ad Lake. July 2. L)14 (Saun.lers, lOl.")!), p. 112); I'.ittcrroot Val- 

 le.v. rai'e in winter, one taken January Id, 1011. on<' seiii January 1."). 11112 

 (Railey, .MS). 



121. Falco peregTinus anatum lionajiarte 



Dii'K Hawk 



A rather rare summer resident throughout most of llie state; perhaps in 

 some localities a permanent resident. Records are almost lacking west of tlic 

 continental divide, and the liird appears to lie. on the whole, commoner east- 

 ward in the prairies. 



Nesting records: Nest and .voung at Two Forks of Milk Ri\'cr, July 17. 

 1874 (Cones, 1874h, p. 622) ; nests and young along Mis.soui'i (Grinnell. Is7(i. p. 

 649); nest on Squaw Creek, Gallatin Count.v (Saunders, 11111a, p. :i6 ) ; nests 

 on cliffs along the Yellowstone near Hillings (Thonuis, ^IS). 



Aligration dates: Spring: Gallatin Valley, Api'il 17, 19(11); German Gidch. 

 Silver Bow County, March 2:?, 1910; Anaconda, April 2:-;, 1911 (Saumlers, 191(la, 

 p. 132). Fall: Rock Creek. Park County, October 2(1, 19l)S. Cameron ivcords 

 the bird as resident in Custer and Dawson counties so it evidently occurs thei'i' 

 in winter. Deer Lodge and Silvei' Row counties are the only jKiints whi>re it 

 has been recorded on the west sitle of the divide. 



