NISCS CUOPEKI— N. FUSCUS. 581 



NiSUS COOPERI. 

 Cooper's Hawk. 



Falco cooperi, Bonap , Am. Orn., I, 1828, j)]. x, fig. 1. 



Accipiter cooperi, I)e Kay, Zool. N. Y., II, 1844, 18, pi. iv, fig. 5.— Cassin, in 



Baird'.s Bird.s N. Am., 1858, IC— Baird, Cat. N. Am. Birds, 18.")», No. 15.— 



Cooi'EU, Orii. Cal., I, 4(;4.— COUES, Key, 1872,212; Check List, 1873, No. 



339; Binls N.W., 1874, 334. 

 Nism cooperi, SoiiLEG., Rev. Ac.c, 1873, 73.— Ridgway, in B. B. & R., Hist. N. 



Am. Birils, III, 1874, 230. — IIensiiaw, 1875, 418. 

 Accipiter mrxicanus, Swains., Fauna Bor. Am., II, 1831, 45 — Cassin, Baird's B. 



N. Am., 1858, 17.— Baihd, Cat. N. Am. B., 1859, No. 10.— Cooi'EU, Orn. Cal., 



1, 1870, 405. 



A'lSMS cooperi var. mexicanus, RiDGW., Proc. Boston Soc. Nat. Hist., May, 1873, 

 19.— B. B. & R., Hist. N. Am. B., Ill, 1874, 231. 



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

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

 mo.st 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 by vig- 

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

 portions of the country, particularly in the fertile canons of the East Hum- 

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

 flight, a fleeing Robin or Flicker. 



List of fipecimetis. 

 240, Sjiiv.; West numboldt Mountains (Camp 19), October 8, 1867. llj- 20g— 

 8J — 0^ — i — 11? — 7 — 4i. Bill, pale blue on the basal third, dull black terminally; cere 

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

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



NiSUS FUSCUS. 



$ili:irp-sliiiiiiod Hawk. 



Fah'o/nscHS, Gmei.IN, Syst. Nat., I, 17S8, 2S3. 



Accipiter fitsrioi, B(>NAP.,Coinp.& Geog. List, 1838,5. — Cassin, in Baird's B. N.Am., 

 1858, 18.— Baird, Cat. N. Am. B., 1859, No. 17.— Cooper, Orn. Cal., 1, 1870, 

 406.- CoiES, Key, 1872, 212; Check List, 187.3, No.3.38 ; Birds N.\V.,1874, 333. 



Nimis fmcus, Kaup, Jardine's Contr. Orn., 1850, 04, 281.— Ividgw., in B. B. & R., 

 Hist. N. Am. B., Ill, 1874, 224.— Henshaw, 1875, 417. 



This miniature of Cooper's Hawk was observed only in the Upper 



