. Bird lore. Birds; Birds; Ornithology. 322 Bird Lore that has been said. Instead of there being a gradual transition from the dark to the Hght areas, there is a sudden, abrupt change, often heightened by a black border. On the head of the Wood Duck, for example, the white of the throat extends up on the cheeks in the form of crescents. These, together with the white stripes through the crest and the black-and-white bars on the sides, would seem to make it most conspicuous. Similarly the Killdeer has its. A CASE OF MIMICRY The Least Bittern, when alarmed, simulates a broken reed in shape as we
. Bird lore. Birds; Birds; Ornithology. 322 Bird Lore that has been said. Instead of there being a gradual transition from the dark to the Hght areas, there is a sudden, abrupt change, often heightened by a black border. On the head of the Wood Duck, for example, the white of the throat extends up on the cheeks in the form of crescents. These, together with the white stripes through the crest and the black-and-white bars on the sides, would seem to make it most conspicuous. Similarly the Killdeer has its. A CASE OF MIMICRY The Least Bittern, when alarmed, simulates a broken reed in shape as well as in color brown head separated from its similarly colored back by a conspicuous white ring, and its snowy breast is crossed by two coal black bands. In spite of these marks, one finds that both the Wood Duck and the Killdeer in their natural environments, are very inconspicuous, and we are led to believe that these 'ruptive marks', as they are called, serve apparently to split up the bird into several pieces, destroy its continuity of form, and thereby conceal it by making it unbirdlike. Those who followed the development of 'camouflage'. 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 National Committee of the Audubon Societies of America; National Association of Audubon Societies for the Protection of Wild Birds and Animals; National Audubon Society. New York City : Macmillan Co.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbirds, booksubjectorn
