LITERATURE CITED 
791 
1927b. Scientific survey of Porto llico and the Virgin Islands (New York, 
New York Academy of Sciences), vol. 9, Parts 3 and 4, The Birds, 
pp. 245-598 4-xiii; 11 pis., 19 figs, (including map). 
1927c. Present status of the check-list of fossil birds for North America: 
The Auk, vol. 44, pp. 179-183. 
Weydemeyer, Winton. 
1923. Notes on the song and the nest of the Ruby-crowned Kinglet: The 
Condor, vol. 25, pp. 117-1 IS. 
Wheeler, William Cummings, and John Treadwell Niciiols. 
1924. The song of the Song Sparrow (a systematic study of its construction): 
The Auk, vol. 41, pp. 444-451; 1 fig. 
Whitney, Thomas Hayes. 
L925. Martins and Martin houses: The Wilson Bulletin, vol. 37, pp. 65-72. 
Whittle, Charles Livy. 
1923. Some aspects of the group habit among birds: The Auk, vol. 40, 
pp. 224-240. 
1926a. Notes on the nesting habits of the Tree Swallow: The Auk, vol. 43, 
pp. 247-248. 
1926b. On the nature of the relationship existing among land birds during 
sustained aerial migration: The Auk, vol. 43, pp. 493-500. 
Whittle, Charles Livy, and Laurence B. Fletcher. 
1924. Further observations on the group habit in birds: The Auk, vol. 41, 
pp. 327-333. 
Whittle, Helen Granger (Mrs. Charles Livy Whittle). 
1923. Recent experiences with nesting Catbirds: The Auk, vol. 40, pp. 
603-606. 
Whitman, F. N. 
1919. A visit with Cedar Waxwings: Bird-Lore, vol. 21, pp. 293-295; 4 
photos. 
Willard, Francis Cattle. 
1899. Nesting of the Water Ouzel: Bull. Cooper Ornith. Club (=Condor, 
vol. 1), pp. 23-24. 
1908. Three Vireos: Nesting notes from the Huachuca Mountains: The 
Condor, vol. 10, pp. 230-234. 
1909a. Behavior of a young Rivoli Hummingbird: The Condor, vol. 11, pp. 
102-103. 
1909b. Nesting of the Arizona Junco: The Condor, vol. 11, pp. 129-131; 
1 photo. 
1909c. The Flammulated Screech Owl: The Condor, vol. 11, pp. 199-202. 
1910a. Nesting of the Western Evening Grosbeak: The Condor, vol. 12, 
pp. 60-62; 1 photo. 
1910b. The Olive Warbler (Dendroica olivacea) in southern Arizona: The 
Condor, vol. 12, pp. 104-107; 2 photos. 
1911. The Blue-throated Hummingbird: The Condor, vol. 13, pp. 46-49. 
1912a. A week afield in southern Arizona: The Condor, vol. 14, pp. 53-63; 
1 photo. 
1912b. Breeding of the Scott Sparrow: The Condor, vol. 14, pp. 195-196. 
1912c. Migration of White-necked Ravens: The Condor, vol. 14, pp. 107-108. 
1912d. Nesting of the Rocky Mountain Nuthatch: The Condor, vol. 14, pp. 
213-215; 2 photos. 
1913. Late nesting of certain birds in Arizona: The Condor, vol. 15, p. 227. 
1916a. Nesting of the Band-tailed Pigeon in southern Arizona: The Condor, 
vol. 18, pp. 110-112; 1 photo. 
1916b. On bicycle and afoot in the Santa Catalina Mountains: The Condor, 
vol. 18, pp. 156-160. 
1918. Evidence that many birds remain mated for life: The Condor, vol. 
20, pp. 167-170. 
1923. The Buff-breasted Flycatcher in the Huachucas: The Condor, vol. 
25, pp. 189-194 ; 4 photos. 
