THE ADULT BIRD 103 



Birds as Protectors of Orchards, Bull. 3, Mass. Board Agric., pp. 20-32. 

 1895. BEAL, F. E. L., The Food of Woodpeckers, Bull. 7, 39 pp. 1896. 

 PALMER, T. S., Extermination of Noxious Animals by Bounties, Yearbook, 

 U. S., Dept. Agr., pp. 55-68. 1897. BEAL, F. E. L., Some Common Birds 

 in their Relation to Agriculture, Farmer's Bull., No. 54, 40 pp. 1898. 

 FORBUSH, E. H., Nature's Foresters, Bull. No. 1, Mass. Board Agric., pp. 

 27-40. 1898. PALMER, T. S., The Danger of Introducing Noxious Animals 

 . and Birds, Yearbook, pp. 87-110. 1898. NASH, C. W., Birds of Ontario in 

 Relation to Agric., Rep. Farmer's Inst. Ont., Dept. Agric., pp. 1-32. 1898. 

 JUDD, S. D., Birds as Weed Destroyers, Yearbook, pp. 221-232. 1899. 

 PALMER, T. S., Review of Economic Orn. in U. S., Yearbook, pp. 259-292. 

 1900. BEAL, F. E. L., How Birds Affect the Orchard, Yearbook, pp. 291- 

 304. 1900. CHAPMAN, F. M., The Value of Birds to the Commonwealth, 

 Rep. Board Agric. Conn., 41 pp. 1901. BRUNER, L., Birds in their Rela- 

 tion to Agriculture, Proc. Neb. Orn. Union, 18-29. 1901. JUDD, S. D., 

 Relation of Sparrows to Agriculture, Bull. 15, Biol. Surv., 98 pp. 1902. 

 JUDD, SYLVESTER D., Birds of a Maryland Farm, Biol. Surv. Bull. 17, 116 

 pp. 1902. FORBUSH, E. H., Two Years With the Birds on a Farm, 

 Mass. State Board Agric., 2nd. Ed. 1903. CHAPMAN, F. M., The Economic 

 Value of Birds to the State, Seventh Rep. N. Y. Forest, Fish and Game 

 Comm., 66 pp. With bibliography. 1903. WEED, C. M., and DEAR- 

 BORN, NED, Birds in Their Relations to Man. A Manual of Economic 

 Ornithology for the U. S. and Canada. 380 pp. With bibliography. 1905. 

 HENSHAW, H. W., Does it Pay the Farmer to Protect Birds. Yearbook, 

 165-178. 1906. HOWELL, A. H., Birds that Eat the Cotton Boll Weevil, Biol. 

 Surv. Bull. 25, 22 pp.; Bull. 29, 30 pp.; Circ. 64, 5 pp. 1906. McATEE, W. 

 L., Birds that Eat Scale Insects, Yearbook, pp. 189-198. 1906. BEAL, F. E. 

 L., Birds as Conservators of the Forests, Rep. N. Y. Forest, Fish and Game 

 Comm., 1902, 3 pp. 235-274. 1907. FORBUSH, E. H., Useful Birds and Their 

 Protection, Mass. State Board Agric., 437 pages. Comprehensive. 1907. 

 HENSHAW, H. W., Value of Swallows as Insect Destroyers, Circ. 56, Biol. 

 Surv., 4 pp. 1907. HENSHAW, H. W., Birds Useful in the War Against 

 the Cotton Boll Weevil, Circ. 57, Biol. Surv., 4 pp. 1908. HENSHAW, H. 

 W., The Policemen of the Air, Natl. Geog. Mag., pp. 79-118. 1911. BEAL, 

 F. E. L., Food of the Woodpeckers of the United States, Bull. 37, Biol. 

 Surv., 64 pp. 



GENERAL ACTIVITIES OF THE ADULT BIRD 



Habitat 



Habit and Structure 



The Bill 



The Wing 



The Tail 



The Feet 

 The Senses 

 Intelligence 

 Status of the Species 



Having devoted the larger part of the space allotted to this Intro- 

 duction to those features of bird study in nature which seem most 

 important from the field student's point of view, our outline of a bird's 

 life may be completed by briefly calling attention to certain other 

 subjects, each of which must be considered if we would approach any- 

 thing like a complete local biography of a given species. 



Habitat. The range or geographical distribution of a species is 



