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 
