THE PRACTICAL VALVE OF BIRDS. 41 



THE LITERATURE OF ECONOMIC ORNITHOLOGY 



The literature of this subject is too voluminous to adequately review or 

 analyze iu a paper of this length. Items concerning the food habits of birds 

 are to be found in most bird books, and scattered through a multitude of 

 pamphlets, magazines, government reports, bulletins and circulars, the pro- 

 ceedings of learned societies, and reports of boards of agriculture and horti- 

 culture. Two most useful volumes are Forbush's Useful Birds and Their 

 Protection, and Weed and Dearborn's Birds in their Relation to Man. Just 

 as this report is ready for the press, two very important works have come 

 to hand. One is Our Vanishing Wild Life, by Hornaday, published in New 

 York. The other is an index to the United States Biological Survey papers 

 on Economic Ornithology, by McAtee, published as a bulletin of the Survey. 

 To the economic papers have been added a number of general reference 

 books, such as Coues' Key, Ridgway's Manual, Chapman's Handbook and 

 Color Key. 



Very much the greater part of the serious work upon this subject has 

 been done by the United States Department of Agriculture, the reports ap- 

 pearing in the Yearbooks, Farmers' Bulletins, and Bulletins and Circulars of 

 the Biological Survey. The literature is so extensive that no attempt is 

 made in the accompanying bibliography to list all papers of this nature. 

 Weed and Dearborn's book contains a rather complete bibliography up to the 

 date of its publication, ten years ago. 



A very large part of the literature has been indexed in detail in the card 

 catalogue and index of the University of Colorado Museum, which is available 

 to students, and all inquiries relating to the subject will be answered, so far 

 as reasonably possible, as part of the extension work of the institution. 



BIBLIOGRAPHY 



Allen, Francis H. National Audubon Society, Educational Leaflet No. 59, The 



White-breasted and Red-breasted Nuthatches. 

 Anthony, A. W. The Roadrunner as a Destroyer of Caterpillars. The Auk, 



Vol. XIV, p. 217, 1897. 

 Attwater, H. P. Boll Weevils and Birds. Address at 2nd. Ann. Convention 



Texas Cotton Growers' Assn., Nov. 6, 1903, printed and distributed by 



S. P. R. R. Co. 

 Bailey, Florence Merriam. National Audubon Society, Educational Leaflet 



No. 43, The Red-headed Woodpecker. 

 - Handbook of Birds of Western United States. 

 Bailey, Vernon. Birds Known to Eat the Boll Weevil. U. S. Dept. Agric., 



Biol. Surv., Bull. No. 22, 1905. 

 Barrows, W. B. The Food of Horned Larks or Shore Larks. U. S. Dept. 



Agric., Rept. for 1892, pp. 193-197, 1893. 



The Food of Crows, U. S. Dept. Agric., Rept. for 1888, pp. 498-535, 1889. 

 Barrows, Walter B., and others. The English Sparrow (Passer domesticus) 



in North America, Especially in its Relation to Agriculture. U. S. 



Dept. Agric., Div. Econ. Orn. & Mam., Bull. No. 1, 1889, 405 pages. 

 The Common Crow of the United States. U. S. Dept. Agric., Div. Orn. 



& Mam., Bull. No. 6, 1895, 110 pnpos. 



