. First lessons in zoology. Zoology. BIRDS 245 school collection. In some cases the general structure of feet and bills may be seen in the live birds by the use of an opera-glass. The characters of bills and feet are much used in the classification of birds, so that any knowledge of them gained primarily in the study of adaptations will have a secondary use in classification Fig. 199. -Ostriches on ostrich-farm at Pasadena, California, from life.) (Photograph Note the foot of the robin, bluebird, catbird, wren, warbler, and other passerine or perching birds. It has three unwebbed toes i
. First lessons in zoology. Zoology. BIRDS 245 school collection. In some cases the general structure of feet and bills may be seen in the live birds by the use of an opera-glass. The characters of bills and feet are much used in the classification of birds, so that any knowledge of them gained primarily in the study of adaptations will have a secondary use in classification Fig. 199. -Ostriches on ostrich-farm at Pasadena, California, from life.) (Photograph Note the foot of the robin, bluebird, catbird, wren, warbler, and other passerine or perching birds. It has three unwebbed toes in front and a long hind toe per- fectly opposable to the middle front one. This is the perching foot. Note the so-called zj'godactyl foot of the. 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 Kellogg, Vernon L. (Vernon Lyman), 1867-1937. New York, H. Holt and Company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1903
