Semi-Pensile, Pensile or Hanging Nests 



627. Warbling Vireo : Vireo gilvus Vieill. 



Adult Upper parts olive green or grayish green; under parts 

 white, slightly tinged with yellow ; line over the eye indis- 

 tinct grayish white. Length 5.80. 



Breeding Range Throughout the Eastern States. 



The nest is similar to that of the red-eyed vireo ; the eggs 

 white, spotted and sometimes blotched with reddish brown. 

 Size .75 x .52. 



This bird is difficult to distinguish from the red-eyed vireo; 

 it is somewhat smaller, the line over the eye less distinct and the 

 song totally different, being more prolonged and melodious. 



The breeding season begins towards the end of May. 



628. Yellow-throated Vireo: Vireo flavifrons Vieill. 



Adult Upper parts yellowish olive; rump gray; ring around 

 the eye yellow; breast light lemon yellow; belly grayish 

 white; distinct white bars on wings. Length 5.95. 



Breeding Range Throughout the Eastern States. 



The nest resembles a good example of the red-eyed vireo's, 

 from five to forty feet from the ground. 



Eggs white with a tinge of pink ; rather more thickly spotted 

 than those of the red-eyed vireo. Size .83 x .61. 



The bright yellow breast serves to distinguish this bird from 

 other members of the vireo family ; the breeding habits are not 

 very different from those of the red-eyed vireo, except that 

 nesting begins rather later. 



629. Blue-headed, or Solitary Vireo: Vireo solitarius 

 (Wils.) 



Adult Upper parts greenish ; head blue gray, with conspicuous 

 white ring round the eye, and white between eye and bill ; 

 under parts whitish, tinged on the sides with greenish 

 yellow; wings have two white bars. Length 5.61. 



Breeding Range Chiefly in the northern part of the United States, 

 and in the higher parts of the Alleghanies further south; 

 rarely in northern New Jersey. 

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