540 Birds of Colorado 



00 DiLLE, F. M. Nesting of the Pine-Siskin at Denver, Colorado. 

 Condor, n., 1900, p. 73. 



00 Delle, F. M. Nesting of the Eastern Bluebird at Denver, Colorado. 



Condor, u., 1900, p. 88. 



02 DmLE, F. M. Western Blue Grosbeak in Northern Colorado. 



Condor iv., 1902, p. 94. 



03 DiLLE, F. M. Nesting Dates for Birds in the Denver District, 



Colorado. Condor, v., 1903, pp. 73-74. 



04 DrLLE, F. M. Eggs of Flammulated Screech Owl and Western 



Evening Grosbeak, taken in Estes Park, Colorado. Condor, 

 VI., 1904, p. 50. 



04 DrLLE, F. M. A Sage-Sparrow in Boulder co., Colorado. Condor, 



VI., 1904, p. 79. 

 09 DiXLE, F. M. Notes of Occurrences and Nesting of certain 



Species additional to the " Birds of Colorado." Auk, xxvi., 



1909, pp. 86-88. 

 81 Drew, F. M. Field Notes on the Birds of San Juan co., Colorado. 



Bull. Nutt. Om. Club, vi., 1881, pp. 85-91, 138-143. An 



important paper ; 104 species mentioned, five for the first time 



within the limits of the State ; other notes on the same subject 



on pp. 115, 244, 249. 



81 Drew, F. M. Lobipes hyperboreus at 9,500 feet. Bull. Nutt. 



Om. Club, VI., 1881, p. 249. Northern Phalarope at Howards- 

 ville, San Juan co. 



82 Drew, F. M. Notes on the Plmnage of Nephoecetes niger borealis. 



Bull. Nutt. Om. Club, vii., 1882, p. 182. Black Swift observed 

 near Howardsville. 



84 Drew, F. M. Notes on Lagopus leucurus. Auk, i., 1884, pp. 392-3. 



85 Drew, F. M. On the Vertical Range of Birds in Colorado. Auk, 



II., 1885, p. 11. A very important article on the birds of 

 Colorado, containing a complete list up to date, and the vertical 

 range of each bird as far as it was known. 

 90 DwiGHT, J., Jr. The Horned Larks of North America. Auk, 

 vn., 1890, pp. 138-158, and one map. 



01 Felger, a. H. The Mexican Cormorant in Colorado. Aiik, 



xvra., 1901, p. 189. 



02 Felger, A. H. Colorado Bird Notes. Auk, six., 1902, p. 294. 



03 Felger, A. H. The Wood Ibis again in Colorado. Auk, xx., 



1903, p. 65. 



05 Felger, A. H. Two Records for Colorado. Auk, xxii., 1905, 



p. 421. Yellow Flicker in Mountains ; Canvas-back breeding. 

 07 Felger, A. H. Ross's Snow-Goose in Colorado. Auk, xxrv., 

 1907, pp. 211-212. 



