HABITS OF BATS. 589 
Bats live in caves and in the hollow of trees by day; all 
hibernate in the same situations, going into winter quarters 
in the autumn, and reappearing in the warm twilight of 
spring. Though the eyes are small, and the sight, so far as 
Fig. 511.—Skeleton of a fruit bat (Pteropus).—After Owen. 
we know, deficient in keenness, they show wonderful skill 
in avoiding objects during their rapid flight. The ears are 
very large, and in the vampires the nose is adorned with 
