. Bird-life : a guide to the study of our common birds . Birds. 18 FORM AND HABIT: TUE WING. tatus). The young of this bird have well-developed claws on the thunil) and first finger, and long before they can flv they nse them as aids in clambering about the Ijushes, very nuieh as we may imagine the Archieopteryx did. In tlie adult these claws are wanting. Some eminently aquatic birds, as Greljes and Pen- guins, when on land, may use their wings as fore legs in scraml)ling awkwardly along ; while some flightless birds, for example, the Osti'ich, spread their wings when run- ning. But let us con
. Bird-life : a guide to the study of our common birds . Birds. 18 FORM AND HABIT: TUE WING. tatus). The young of this bird have well-developed claws on the thunil) and first finger, and long before they can flv they nse them as aids in clambering about the Ijushes, very nuieh as we may imagine the Archieopteryx did. In tlie adult these claws are wanting. Some eminently aquatic birds, as Greljes and Pen- guins, when on land, may use their wings as fore legs in scraml)ling awkwardly along ; while some flightless birds, for example, the Osti'ich, spread their wings when run- ning. But let us consider the wing in its true ofliee, that of an organ of flight, showing its range of variation, and finally its degradation into a flightless organ. Among flying birds the spread wiiiffs measure in extent from about three inches in the smallest Hummingbird to twelve or fourteen feet in the Wandering Albatross. The relation between shape of wing and style of flight is so close that if you show an ornithologist a bird's wing he can generally tell you the character of its owner's flight. The ex- tremes are shown by the short-winged ground birds. Fia. 5.—Short, rounded winfr and large foot of Little Black Kail, a terres- trial l-iird. (Vj natural size.). FiQ. 6.—Long, pointed wing and small foot of Tree Swallow, an aerial bird. (3/5 natural size.) such as liail, Quail, Grouse, certain Sparrows, etc., and long-winged birds, like the Swallows and Albatrosses. There is here a close and, for the ground-inhabiting. 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 Chapman, Frank M. (Frank Michler), 1864-1945; Seton, Ernest Thompson, 1860-1946. New York : D. Appleton
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Keywords: ., bookauthorchap, bookcentury1800, bookdecade1890, booksubjectbirds
