54 PACIFIC COAST AVIFAUNA No. 12 



82. Circus hudsonius (Linnaeus) 



Marsh Hawk 



Circus hudsonius (/) van Rossem, Condor, xi, 1909, p. 208. (i) Burt, Condor, xiii, 1911, 

 p. 166. (3) Willett, Pac. Coast Avif., 7, 1912, p. 46. 



Evid(»ntly a straggler to the islands. A. van Kosseiii (1) shot a female on 

 the Coronados, April 6, 1909; H. C. Bnrt (2) took an immature male on Anaca- 

 pa, March 15, 1911; and C. B. Linton (MS) tells me that he has seen the species 

 on Santa Cruz. 



83. Accipiter velox (Wilson) 



Sharp-shinned Hawk 



Accipiter velox (/) Mailliard, Bull. Cooper Orn. Club, i, 1899, p. 44. {:i) Richardson, 

 Condor, x, 1908, p. 66. (3) Linton, Condor, xi, 1909, p. 194. ( ',) Willett, Pac. Coast 

 Avif., 7, 1912, p. 46. 



Probably not rare during the fall, winter and early spring. On San Cle- 

 mente, C. B. Linton (.5) saw several of these birds during December, 1908; C. H. 

 Richardson (,2) recorded one from Catalina, April 19. 1905; and J. Mailliard {1) 

 lists it as having occurred on Santa Cruz in April, 1908. 



84. Accipiter cooperi (Bonaparte) 



Cooper Hawk 



Accipiter cooperi (1) Mailliard, Bull. Cooper Orn. Club, i, 1899, p. 44. (2) Howell and 

 van Rossem, Condor, xiii, 1911, p. 209. (3) Willett, Pac. Coast Avif., 7, 1912, p. 46. 

 ( '/) Grinnell, Pac. Coast Avif., 11, 1915, p. 64. 



Recorded only from Santa Cruz Island, where I believe it to be resident in 

 small numbers. J. Mailliard (1) lists the species from that locality during April, 

 1908, and on April 25, 1911, I (5) saw a pair at the lower edge of the pines which 

 acted very much as if they had a nest near by. 



85. Buteo borealis calurus Cassin 



Western Red- tail 



Buteo borealis cnlurus {/) Grinnell, Auk, xv, 1898, p. 234. (3) Mailliard, Bull. Cooper 

 Orn. Club, i, 1899, p. 44. (3) Breninger, Auk, xxi, 1904, p. 220. ('/) Richardson, 

 Condor, x, 1908, p. 66. (5) Linton, Condor, x, 1908, p. 83. {(>) Linton, Condor, x, 

 1908, p. 127. (7) Grinnell, Pac. Coast Avif., 11, 1915, p. 65. 



Fairly common resident of the larger islands. C. B. Linton (.5) says that 

 several pairs were nesting on San Clemente in 1907, and L. M. Huey (MS) saw 

 a bird there JMarch 25, 1915. I have found it connnon in the early spring at Cat- 

 alina, and on April 11, 1911, discovered in a tree a nest that held two pipped 

 eggs. J. Grinnell (1) saw two or three every day when he was there in Decem- 

 ber, 1897. C. B. Linton (6) noted several on Santa Cruz during November and 

 December. 1907, and A. van Rossem and I saw one theiv May 1, 1911. 



