I50 WITH THE U. S. NATURALISTS 



of those that have reason to fear birds of prey. 

 Strong, fast or wily birds fly by day. Fast-flyers, 

 like the Swallows and Swifts, can dodge any 

 Hawk. Grackles and Crows are thoroughly able 

 to look after themselves. The Blue Jay is a bird 

 to be let alone. So, too, the big birds, like Pelicans 

 and Gulls, are free from foes. They migrate by 

 day. 



*'It is quite another matter for the little birds 

 which haunt the trees and the bushes. Thrushes, 

 Warblers, Vireos and the small Flycatchers are all 

 night flyers. It is they who are attracted by the 

 gleams of lighthouses on dark and stormy nights. 

 Similarly Snipe and Plover, with long pointed 

 wings, birds of strong flight, migrate partly by 

 day, while their cousin the Woodcock, with short 

 round wings, flies by night. The Loon, a strong 

 flyer, migrates by day, while the shy Grebe, who 

 usually depends for safety on his diving, migrates 

 by night. 



''Ducks and Geese, many of the shore-birds, and 

 nearly all the sea-birds, migrate both by day and 

 night. You can see the wedge of the Wild Geese 

 as they fly by day and hear their honking call as 

 they fly by night, for then they fly low and call 

 oftener to keep the flock together. 



