BIRDS OF COLORADO. 
27 
CocKERKLL, T. D. A. The Sixth Report of the Colorado 
Biological Association. Custer County Coura7tt^ January 
16, 1889. 
Note from H W. Nash of the recent capture of the Pygmy Owl near 
Pueblo. 
Cockerell, T. D. A. The Ninth Report of the Colorado 
Biological Association. “Our Spring Migrants,” T. D. A. 
C[ockerell]. Custer County Courant^ February^ 1889. 
Dates of arrival for 1888 of ii species. 
Cockerell, T. D. A. The Thirteenth Report of the Colorado 
Biological Association. Custer County Coura^it^ March^ 
1889. 
Robins first seen near Short Creek, March 19, 1889. 
[Oversheets of all these reports were issued, unpaged and mostly un- 
dated ]. 
Cooke, W. W. Ten New Birds for Colorado. Auk^ XL 1894, 
p. 182. 
Records of some 15 species, of which Oidemia deglandi, Ardetta exiliSy 
Calidris arenaria and Coccyzus erythrophthalmuSy proved to be new birds for 
the State. 
Cooke, W. W. The Summer Range of Colorado Birds. Atik, 
XII. 1895, p. 1 51. 
Gives recapitulation of the altitudes at which the birds breed in the State, 
but mentions only a few species by name. 
Codes, E. Range of the Geococcyx california7ms. Am. Nat- 
uralist.^ VII. 1873, P' 75 ^' 
Quotes a letter from Dr. A. Woodhull on the occurrence of this species 
on the Arkansas River near Fort Lyon, Colorado. 
Codes, E. Department of the Interior. United States Geolog- 
ical Survey of the Territories. F. V. Hayden. U. S. 
Geologist in Charge. Miscellaneous Publications No. 3. 
Birds of the Northwest. A Hand-book of The Ornithol- 
ogy of the Region drained by the Missouri River and its 
Tributaries. By Elliott Cones, Captain and Assistant 
Surgeon U. S. Armv. Washington: Government Printing 
Office, 1874. pp. XII. 791. 
A large part of Colorado falling within the scope of this volume, there is 
here collected nearly all that had been written on Colorado birds up to this 
time. One hundred and forty-five species are attributed specifically to Colorado, 
in addition to many whose habitat includes Colorado by implication. But the 
most important part of the work with reference to Colorado, is the very full and 
valuable notes of Mr. T. M. Trippe on the birds in the vicinity of Idaho Springs. 
They form to-day the best record there is of the vertical movements of the birds 
in spring and fall migration. 
Codes, E. On the Breeding Habits, Nest and Eggs of the 
White-tailed Ptarmigan (Z. leucurus). Bull. U. S. Geo- 
logical Surv. Terr. 2d. series^ No. 5, Ja7tuary 8, 1876, pp. 
26^-266. 
Most of the material on which these notes are based came from Colorado. 
