248 



VERTEBRATA 



try, is one of the few birds living on fish. It nests in 

 deep holes at the water's edge. 



Hawks, Owls, and Eagles (Raptores) 



The members of this order are called birds of prey, 

 although many of them feed largely on insects and 

 are therefore beneficial. They are characterized by a 



FIG. 283. Young bluebird two weeks old just ready to fly. Two broods are 

 batched yearly in the cavity of this old fence post. Photograph one sixth life size. 



