_Corvus columbianus_, WILSON, Am. Orn. III, 1811, 29, pl. xx.—BON. Obs. Wilson, 1824, No. 38.—IB. Syn. 1828, 57.—NUTTALL, I, 1832, 218. _Nucifraga columbiana_, AUD. Orn. Biog. IV, 1838, 459, pl. ccclxii.—IB. Syn. 1839, 156.—IB. Birds Am. IV, 1842, 127, pl. ccxxxv.—BON. List, 1838.—NUTTALL, Man. I, (2d ed.,) 251. _Picicorvus columbianus_, BONAP. Consp. 1850, 384.—NEWBERRY, P. R. R. Rep. VI, IV, 1837, 83.—BAIRD, Birds N. Am. 1858, 573.—LORD, Pr. R. A. Inst. IV, 121 (British Columbia).—DALL & BANNISTER, Tr. Chic. Ac. I, 1869, 286.—COOPER, Orn. Cal. 1, 1870, 289. “_Corvus megonyx_, WAGLER.” SP. CHAR. Tail rounded or moderately graduated, the closed wings reaching nearly to its tip. Fourth quill longest; second considerably shorter than the sixth. General color bluish-ash, changing on the nasal feathers, the forehead, sides of head (especially around the eye), and chin, to white. The wings, including their inner surface, greenish-black, the secondaries and tertials, except the innermost, broadly tipped with white; tail white, the inner web of the fifth feather and the whole of the sixth, with the upper tail-coverts, greenish-black. The axillars plumbeous-black. Bill and feet black. Young similar in color, without additional markings of any kind. The gonys, however, convex, and the bill generally more like that of the Jays. Length of male (fresh), 12.00; wing, 7.00; tail, 4.30; tarsus, 1.20. HAB. From Rocky Mountains to Pacific. East to Fort Kearney, north to Sitka, south to Arizona. HABITS. Clarke’s Crow was first met with by the parties composing the celebrated exploring party to the Rocky Mountains under the direction of Lewis and Clarke. It was described by Wilson in 1811, who was informed by individuals belonging to the expedition that these birds were found inhabiting the shores of the Columbia and the adjacent country in great numbers, frequenting the rivers and sea-shore, and that it seemed to have all the noisy and gregarious habits of the common Crow of Europe. In his account of this species, Mr. Nuttall states that during his journey westward in the month of July, he first observed individuals of this bird in a small grove of pines on the borders of Bear River, near where it falls into Lake Timpanagos. This was at a height of about seven thousand feet above the sea level, and in the 42d parallel. Their habits appeared to him to correspond with those of the Nutcrackers of Europe.