136 



VERTEBRATES I BIRDS. 



five feet in length, together with turf, rank weeds, and 

 lichens, and is occupied by the same pair year after 

 year. The eggs are two to four, dull white, and equally 

 rounded at both ends. The attachment of the parents 

 to the young while unable to fly is very great, and for a 

 man to ascend to the nest at such times is very danger- 

 ous ; but when the young are able to fly, the old ones 

 drive them from the nest, to which, however, they return 

 at night for several weeks. This eagle preys upon fish, 



