6s6 Field Museum of Natural History — Zoology, Vol. IX. 



319. Dendroica blackburniae (Gmel.). 

 Blackburnian Warbler. 



Distr.: Eastern North America, west to eastern Texas, Kansas, 

 and Manitoba, north to Hudson Bay and Labrador; breeds from the 

 southern AUeghanies, Massachusetts, Michigan, and Wisconsin north- 

 ward; south in winter to Central America and northwestern South 

 America to Peru. 



Male. Blackburnian Warbler. Tail. 



Adult male: Crown, black, with an orange patch in the centre; 

 sides of head, black, bordered above by an orange superciliary stripe; 

 throat and breast, bright orange; back, black, more or less streaked 

 with white; belly, pale yellowish; sides streaked with black ; greater 

 portion of wing coverts, white, forming a large white wing patch. 

 Tail feathers, except the middle ones, have the inner webs of the 

 inner feathers, and the narrow outer web of the outer feather, white, 

 except near the tips. 



Adult female: Upper plumage, grayish olive, streaked with black, 

 some of the feathers edged with whitish; crown with yellow patch 

 in center; superciliary line and throat pale orange yellow, shading 

 into yellowish white on the belly; sides streaked with dusky. 



Immature birds resemble the female, but are paler, the back 

 browner, and the yellow crown spot more restricted. 



Diagnostic characters in any plumage: Basal portion of outer wsb 

 of outer tail feather, white; throat, yellow or orange; crown with at 

 least a trace of yellow or orange in the centre. 



Length, 5; wing, 2.67; tail, 2; bill, .34. 



The Blackburnian Warbler is a very common migrant in Illinois 

 and Wisconsin in spring and fall and a summer resident in the latter 

 state. Mr. John F. Ferry procured a female with denuded abdomen 

 and carrying an insect in its bill on July 3, 1908, near Trout Lake, 

 Vilas Co., Wisconsin, and the writer found the species not uncommon 

 in the same locality between July 23 and 30. 



Regarding its nesting in Wisconsin, Messrs. Kumlien and HoUister 



