Nisns COOPEKl— N. FUSCUS. 581 



NiSUS COOPEUI. 

 Cooper's Hawk. 



Falco coopcri, BoNAP , Am. Orn., I, 1828, pi. x, lig. 1. 



Accipiter cooperi, De Kay, Zool. N. Y., II, 1S44, IS, pi. iv, fig. 5. — Cassin, in 



Baird'.s Birds N. Am., 1858, IG.— Baird, Cat. N. Am. Birds, 1859, No. 15.— 



CooPEU, Orn. Cal., I, 4(54.— Coues, Key, 1872,1212; Check List, 1873, No. 



330; Birds N.W., 1874, 334. 

 Msiis cooperi, Sciileg., Rev. Ace, 1873, 73. — Ridgway, in B. B. & R., Ilist. X. 



Am. Birds, III, 1874, 230.— IlENSHAW, 1875, 418. 

 Arcipiter mrxicamis, SWAINS., Fauna Bor. Am., II, 1831, 45. — Cassix, Baird'.s B. 



N. Am., 1858, 17. — Baied, Cat. N. Am. B., 1850, No. 10. — Cooi'Eii, Orn. Cal., 



1, 1870, 405. 

 Nism coopcri var. mcjcicanvs, RiDGW., Proc. Boston Soc. Nat. Eist., May, 1S73, 



10.— B. B. & 11., Hist. N. Am. B., Ill, 1874, 231. 



This daring depredator was more or less common in all localities whore 

 small birds abounded, but it was far from numerous anywhere. It was 

 most often seen sailing, with the long tail widely expanded, in broad 

 circles over the thickets which sheltered its prey. The specimen in the 

 collection was shot while soaring thus over an aspen copse, and came whirl- 

 ing to the ground; but being merely winged, made for the thicket b}^ vig- 

 (irous leaps, and would have escaped but for a second charge. In other 

 portions of the country, j^articularly in the fertile canons of the East Hum- 

 boldt Mountains, it was often observed chasing, with its swift, rushing 

 Hi gilt, a fleeing Robin or Flicker. 



List of specimens. 

 240, ijuv.; West Humboldt Mountains (Camp 19), October 8, 1867. 143— 20|— 

 Si — CJ — i— Ijl — " — ii- Bill, pale blue on the basal third, dull black termiually; cere 

 and rictus, yellowish-greeu ; iris, light chrome-yellow; tarsi and toes, lemon-yellow, 

 with a sliglit tinge of green ; claws, slate black. 



Xisus ruscus. 



jtliarp-sliiiiiicd Hawk. 



Falco fit.'iCHs, Gmemn, Syst. Nat., I, 1788, 283. 



Accipiterfuscus, BoNAP., Comp. & Geog. List, 1838,5 —Cassin, in Baird's B. N.Am., 

 1858, 18.— Baird, Cat. N. Am. B., 1850, No. 17.— Cooper, Orn. Cal., 1, 1870, 

 400.- CoUES, Key, 1872, 212; Check List, 1873, No. 338 ; Birds N.W.,1874, 333. 



Msus fuscHs, Kaup, Jardiue's Coutr. Orn., 1850, 04, 281.— Ridgw., in B. B. & R., 

 HLst. N. Am. B., Ill, 1874, 224.— IIensuaw, 1875, 417. 



This miniature of Cooper's Hawk was observed oul}- in the Upper 



