16 



U. S. p. E. E. EXP. AND SUEVEYS — ZOOLOGY — GENEEAL EEPOET. 



under surface of the body in the present bird never assume that degree of regularity which is 

 commonly met with in the European bird, and it is in other respects quite distinct^ as pointed 

 out by the distinguished naturalists who have described it, Wilson and Temminck. 



lAst of specimens. 



C9 



g 



6906 

 6846 

 5839 

 8508 

 8509 



4365 j 



4518 ' 



8507 I 



Locality. 



Nelson river, H. B... 

 Port Townsend.W.T. 

 FortSteilacoom,W. T. 

 do do 



do.. do 



do do 



Shoal water Bay, W.T. 

 Dalles, 0. T 



When collected. 



Jan., 1857. 

 Aug., 1856 . 



Mar. 25, 1856. 



Jan. 0, 1855 

 Mar.b 1854. 



Whence obtained. 



D. Gunn ... 

 Dr. Suckley. 

 do 



Governor Stevens . 



Dr. Suckley 



Dr. Potts , 



Dr. Cooper 



Governor Stevens . 



a 



s 

 a 



528 

 101 

 306 



120 

 141 



Collected by — 



Measurements. 



a 



Dr. Suckley. 



22.00 

 22.50 



Dr. Suckley. 



^ 



40.00 

 38.00 



ACCIPITER, Br isson. 



Accifiler, Bkisson, Cm. I, 310, (1760.) 

 General form more slender and smaller than Aslur, but otherwise similar. Wings short, tail long, tarsi long and slender, 

 frequently with the scales in front nearly obsolete. Contains about twenty species of all countries, several of which intimately 

 resemble each other. Colors in North American species very similar to each ether, especially in adult specimens, though they 

 differ materially in size. 



ACCIPITER COOPERII, Bonaparte. 



Cooper's Hawk. 



Falco Cooperii, Bonap. Am. Orn. II, 1. (1828.) 

 Falco Slanleii, AuD., Orn. Biog. I, 186. (1831.) 

 Figures.— Bonap. Am. Orn. I, fig. 1 ; Aud. B. of Am. pi. 36, 141, fig. 3, ct. ed. 1, pi. 24. 



^i^lt. Head above brownish black, mixed with white on the occiput, other upper parts dark ashy brown, with the shafts of 



the feathers brownish black ; an obscure rufous collar on the neck behind. Throat and under tail coverts while, the former with 

 lines of dark brown, other under parts transversely barred with light rufous and white. Quills ashy brown, with darker bands, 

 and white irregular markings on their inner webs ; tail dark cinereous, tipped with white, and with four wide bands of brownish 



black. 



Young. Head and neck behind yellowish white, tinged with rufous, and with longitudinal stripes and oblong spo of brown; 



other upper parts light amber brown, with large partially concealed f pots and bars of white; upper tail coverts lipped with white; 

 under purts white, with narrow longitudinal stripes of light brown, tail as in adult ; bill blueish horn-color ; tarsi yellow. 



Dimensions.— Female, total length 18 to 20 inches, wing 10 to 11 , tail 8] inches ; male, 16 to 18 inches, wing 91 to 10, tail 



8 inches. 



Hod.— All of temperate North America. Chile (Gay). Spec, in Nat. Mus., Washington and Mus. Acad. Philadelphia. 



This species, rather common on the coast of the Atlantic, is apparently not so abundant in 

 the western countries of the United States. Three specimens only are in the present collection, 



