. Adventure--travel--exploration. Roosevelt, Theodore, 1858-1919; Zoology. BIRDS OF PREY 2§i themselves away in hollow trees or old ruins, into which the unwelcome light cannot penetrate; and it is not until some little time after sunset that they make their appearance. Then through the hours of night they hunt for prey, and can see their victims as clearly in the darkness as hawks can in broad day-light. Now, it is evident enough that the eyes of the owls must he very differently formed from those of the hawks, for otherwise they would be of no use at all after nightfall. And, when we come to
. Adventure--travel--exploration. Roosevelt, Theodore, 1858-1919; Zoology. BIRDS OF PREY 2§i themselves away in hollow trees or old ruins, into which the unwelcome light cannot penetrate; and it is not until some little time after sunset that they make their appearance. Then through the hours of night they hunt for prey, and can see their victims as clearly in the darkness as hawks can in broad day-light. Now, it is evident enough that the eyes of the owls must he very differently formed from those of the hawks, for otherwise they would be of no use at all after nightfall. And, when we come to examine them, we find at once that such is the cace. Not only are their eyes very large themselves, but, as you must have noticed, they are surrounded by a kind of circular ring, sometimes composed of white feathers and sometimes of THE SECRETARY BIRD If the thick plumage of the owl's head were all set in the usual manner, the feathers would project so far in front of the eyes that the bird would have scarcely any range of sight. But the curious feathery circle which surrounds the owl's eyes serves as a narrow slit in a deep window casing, and enables it to see in all directions; so that, without moving its head, it is able to keep watch over a very large extent of country. In other parts of their structure the owls are not at all unlike th«?. 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 Unger, Frederic William, 1875- [from old catalog]. [Philadelphia, The John C. Winston co. ]
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectr, booksubjectzoology
