. Principles of economic zoo?logy. Zoology, Economic. LA\D BIRDS 295 The sharp-shinned hawk is small (length, 111 inches), with a long square tail marked by widely separated dark bands across it, the widest one nearest the end. The principal food is song birds, so this hawk should be destroyed wherever found. Cooper's hawk is dark brown with grayish and brownish spotted under parts. Its tail is round. In food habits it is much like the sharp-shinned hawk, and it should be destroyed. Tlie red-tailed hawk (Fig. 241), more often called the chicken-hawk, is a great destroyer of injurious mammals.
. Principles of economic zoo?logy. Zoology, Economic. LA\D BIRDS 295 The sharp-shinned hawk is small (length, 111 inches), with a long square tail marked by widely separated dark bands across it, the widest one nearest the end. The principal food is song birds, so this hawk should be destroyed wherever found. Cooper's hawk is dark brown with grayish and brownish spotted under parts. Its tail is round. In food habits it is much like the sharp-shinned hawk, and it should be destroyed. Tlie red-tailed hawk (Fig. 241), more often called the chicken-hawk, is a great destroyer of injurious mammals. Poultry and other birds do not constitute 10 per cent, of this hawk's food, and all other beneficial animals which it eats added do not make 15 per cent. So its record is 85 per cent, as a friend, against 15 per cent, as an enemy, of the Fig. 2il.—Red-tailed hawk (much reduced). Length, 21 inches. (Bulle- tin 17, Biological Survey, 1902.) Owls in America north of Mexico number eighteen species. " They vary in size from the tiny elf-owl of Arizona (only 6 inches long) to the great gray owl of the .\rctic regions (30 inches long). The owls (Fig. 242) (Bubon'idce and Strig'idce) have a soft plumage, hence their silent flight. Their eyes are large and dilatable, enabling them to see well at night. The face is so broad that both eyes look forward. They are immovable, so that to look in another direction the head must be turned. They have a peculiar voice, a screech in our little screech owl and a " who-hoo-whoo " in the great homed owl. AA'hen one is camping in the woods the sound of this bird gives one queer creepy feelings until one knows what is making it. Owls live chiefly on rats, mice, frogs, snakes, and rabbits. Some of the smaller. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherphila, bookyear1915
