. The bird; its form and function . ust needs be expressed all toooften in the life of these timid and comparatively de-fenceless creatures, is made apparent by the dilatingeyes and the open, panting beak. The only exceptionwhich comes to mind is the Crowned Crane, Fig. 206,the suffusing of whose bare, white cheeks indicates thechanging emotions. Perhaps the best index is to befound in the crest, which we will find to be developed toa very remarkable degree. The eyes of most birds are placed at the sides of thehead, in such a position that the bird cannot bring bothto bear simultaneously upon
. The bird; its form and function . ust needs be expressed all toooften in the life of these timid and comparatively de-fenceless creatures, is made apparent by the dilatingeyes and the open, panting beak. The only exceptionwhich comes to mind is the Crowned Crane, Fig. 206,the suffusing of whose bare, white cheeks indicates thechanging emotions. Perhaps the best index is to befound in the crest, which we will find to be developed toa very remarkable degree. The eyes of most birds are placed at the sides of thehead, in such a position that the bird cannot bring bothto bear simultaneously upon the same object, but is com-pelled to turn its head and look sideways. As birds 252 Heads and Necks 2C2 spend so much of their time in the air, or in trees, wheredanger may threaten from all sides, above or below, thisarrangement is most useful to them, giving them com-mand of almost their whole surroundings, whereas, with-out turning the head, we can see only ahead of us. Inmuch the same relative position, the two ears are placed,.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbirds, bookyear1906
