THE BIRD BOOK 



627a. Western Warbling Vireo. Fireo- 

 sylva gilva swainsoni. 



Range. — Western United States, breeding 

 from Mexico to British Columbia. 



This species is like the last but said to be 

 a trifle smaller and paler color. Its nesting 

 habits and eggs are precisely like those of 

 the eastern form. 



628. 



Lanivireo 



Yellow-throated Vireo. 

 flavifrons. 



Range. — United States east 

 of the Plains, breeding from 

 the Gulf to Manitoba and 

 New Brunswick. 



This handsome bird is 

 wholly unlike any others of 

 the Vireos, having a bright 

 yellow throat and breast; the 

 upper parts are greenish and the wings and 

 tail gray, the latter with two white bars. They 

 are fairly common breeding birds in northern 

 United States, placing their handsome basket- 

 like structures in forks of branches and at any 

 elevation from the ground; the nests are like those of the preceding Vireos but 

 are frequently adorned on the outside with lichens, thereby adding materially 

 to their natural beauty. The four or five eggs are pinkish or creamy white, 

 speckled about the large end with reddish brown. Size .80 x .60. 



Creamy white 



w-throated Vireo 



629- 



Blue-headed Vireo. Lanivireo solitarius solitarius. 



Range. — Eastern United States, breeding from southern 

 New England and the northern states north to Hudson Bay; 

 winters in the Gulf States and southward. 



A beautiful Vireo with a slaty blue crown and nape, greenish 

 back, white wing bars and underparts, the flanks being washed 

 with greenish yellow; a conspicuous mark is the white eye 

 ring and loral spot. They build firm, pensile, basket-like 

 White nests of strips of birch and grapevine bark, lined with fine 



grasses and hair, suspended from forks, usually 

 at low elevation and often in pine or fir tree;> 

 (of some twenty nests that I have found in 

 New England all have been in low branches oi 

 conifers). Their three or four white eggs are 

 specked with reddish brown. Size .80 x .60. 



629a. Cassin's Vireo. Lanivireo solitarius 

 cassini. 



Range. — United States west of the Rockies; 

 north to British Columbia. 



Similar to the last but with the back grayish. 



629b. Plumbeous Vireo. Lanivireo soli- 



Range.— Rocky Mountain region, breeding 

 from Mexico to Dakota and Wyoming. 



Like the Blue-headed Vireo but with the 

 yellowish wholly replaced by leaden gray. 



382 



Blue-headed Vireo 



