. The bird, its form and function. Birds. 296 The Bird forms entire!}' different, and thought to be due solely to the amount of moisture in the ground on which it lives. Very dark-coloured and ver\' pale individuals live within a few hundred j-ards of each other, in dry and swampy situations respecti\el}', each, it is said, keeping entirely to its own little beat. We are ah familiar with the changes of colour due to. Fi(i -'.'111.—Nighthawk perching lengthwise on a fallen branch. age, as, for instance, in the young Rose-breasted Gros- beaks, which are very cUfferent from the male parent, and t
. The bird, its form and function. Birds. 296 The Bird forms entire!}' different, and thought to be due solely to the amount of moisture in the ground on which it lives. Very dark-coloured and ver\' pale individuals live within a few hundred j-ards of each other, in dry and swampy situations respecti\el}', each, it is said, keeping entirely to its own little beat. We are ah familiar with the changes of colour due to. Fi(i -'.'111.—Nighthawk perching lengthwise on a fallen branch. age, as, for instance, in the young Rose-breasted Gros- beaks, which are very cUfferent from the male parent, and the }'oung Bald Eagles, which lack the white colour of the feathers of head and tail. Certain wild pigeons show marked differences in colour patterns between the 3'oung and the adults, and very good evidence of the gradual evolution which nuist have preceded these changes is. 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 Beebe, William, 1877-1962. New York, Holt
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbirds, bookyear1906
