. Essentials of biology presented in problems. Biology. THE VERTEBRATE ANIMALS 309. as the ostrich and cassowary, are said to belong to the Ratitce. These birds malve up for their lacli: of wing de- velopment by having the legs strong and long. The flying birds are further subdivided into a number of orders, the clas- sification based upon the adaptations of different parts of the bird, especially the legs and feet, the wings and the bill, to different functions. We shall not trouble ourselves to learn all the diiierent groups, but shall content ourselves with picking out some of the more evid
. Essentials of biology presented in problems. Biology. THE VERTEBRATE ANIMALS 309. as the ostrich and cassowary, are said to belong to the Ratitce. These birds malve up for their lacli: of wing de- velopment by having the legs strong and long. The flying birds are further subdivided into a number of orders, the clas- sification based upon the adaptations of different parts of the bird, especially the legs and feet, the wings and the bill, to different functions. We shall not trouble ourselves to learn all the diiierent groups, but shall content ourselves with picking out some of the more evident and important ones, especially those which we might _ meet in field trips. I. Perching Birds. — To this order belong most of our common birds, — sparrows, swallows, larks, blackbirds, orioles, kingbirds, and many others well known to e\ery bird lover. In this group the Wliite-throatcd sparrow {Zoiiotrtcltlu albicollis).. 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 Hunter, George William, 1873-1948. New York, Cincinnati [etc. ] American Book Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbiology, bookyear1911
