ICO CooKK, SiDiimrr Romrc of Colorado Birds. Ia 1 



Zonotrichia riiicrca Gray, Gen. Bds. II, 1849, p. 373. — ^Eonap. Consp. 

 Gen. Av. I, 1850, p. 478. 



Mclospiza insiffuisYiM^i., Proc. Cal. Acad. Sci. V, 1S73, p. 27. [Unalaska ; 

 Shumagins.] Ibid., 1874, p. 274. [Kyska.] — IIensh. Bull. N. O. C. IV, 



1 879' P- 159 (part)- 



Mclospiza ntclodia var. iusijruis Baird, Brew. & Riixivv. Hist. N. A. 

 Bd.s. TI, 1874, p. 30 (part). 



Melospiza melodia h. insignis Couks, Bds. N. W. 1874, p. 139 (part). 



Mclospiza cincrca Fin.sch, Abhandl. Nat. Ver. Brem. Ill, 1872, pp. 20,41. 

 [Unalaska.] —RiDGW. Proc. U. S. N. M. Ill, 1880, pp. 3, 180 (part).— 

 CouES, Check-List, 1882, p. 54 (part). —Bean, Proc. U. S. N. M. V, 1882, 

 pp. 154, 172 (part). — Nelson, Cruise 'Corwin,' 1883, p. 72 (part). — 

 CouEs, Key N. A. Bds. 2nd ed., 1884, p. 372 (part). — Turner, Auk, II, 

 1885, p. 157. [Nearer Islands.] —A. O. U. Check-List, 1886, p. 281 (part). 

 — Turner, Contr. N. II. Alaska, 1886, pp. 174, 194 (part). — Nelson, 

 Rept. N. H. Alaska, 1887, p. 193 (part). — Ridgw., Man. N. A. Bds., 1887, 

 p. 432 (part). — SiiARPE, Cat. Bds. B. M. XII, 1888, p. 707 (part). 



Emberiza unalaschccnsis Brandt, Descr. Anim. Ross.pl. II, (ig- 4. — - 

 FiNscH, Abhandl. Nat. Ver. Brem. Ill, 1872, p. 20. — Schal(;w, J. f. O. 

 1891, p. 256. [Unalaska.] 



THE SUMMER RANGE OF COLORADO BIRDS. 



I?Y W. W. COOKE. 



No OTHER State in the Union has .so great a variety of birds 

 as Colorado. This arises from its location at the meeting place 

 of eastern and western forms. The continental divide passes 

 through the middle of the State, and while the plains of the 

 .southeast offer a fit habitation for most of the Mississippi Valley 

 birds, the western slopes are visited by most of the Pacific 

 coast species. Many southern birds reach Colorado during 

 the heat of summer and most of the northern birds can be 

 found on her mountains in winter. Such a combination of 

 location and topography results in a widely varied bird fauna. 

 There has not been much study made of Colorado ornithology, 

 but up to date the State list includes 347 species. The general 

 character of the fauna is western as shown by the fact that 



