BLACK-THROATED BLUE WARBLER 



135 



Fall Migration 



The Bird and its Haunts. The sharply contrasted black and 

 white areas and dark blue back, which characterize the male Black- 

 throated Blue, are so unlike the colors of any other Warbler that 

 the bird may be known at a glance. Fortunately the adult wears his 

 plumage throughout the year and, contrary to the usual rule, the 

 young male closely resembles him. The female, however, is as 



