French: Viréo à tête bleue German: Graukopfvireo Spanish: Vireo solitario
Bartram’s woods, near Philadelphia, Pennsylvania, USA
Subspecies and Distribution
V. s. solitarius
(A. Wilson, 1810) – Canada (SW Northwest Territories and W Alberta E to SW Newfoundland and Nova Scotia) S in E USA to N Minnesota, N Wisconsin, Pennsylvania and New Jersey; migrates to S USA (C Texas E to C North Carolina, S to C Florida), E Mexico and S mainly to N Nicaragua, rarely W Cuba and I of Pines.
V. s. alticola
Brewster, 1886 – S Appalachians from NE West Virginia and W Maryland S to N Georgia, casually elsewhere E of mountains; migrates to SE USA (SE Louisiana E to S South Carolina, S to S Florida).
13–15 cm; 14·1-19 g. Nominate race has crown, nape and ear-coverts slate-grey or blue-grey, sometimes with slight greenish suffusions, eyering and area above... read more
Primary song, by male alone, a series of discrete phrases, each c. 0·3 seconds in length and... read more
In N parts of range, typically coniferous forest with spruce (Picea), fir (Abies... read more
Food and feeding
Diet during breeding predominantly of animal items (96%), with little vegetable matter (4%); on wintering grounds much more vegetarian (up... read more
Laying from late Apr to early May in Georgia and the Carolinas, and late May to early Jun in Wisconsin and Quebec; probably single-brooded... read more
N race (nominate) highly migratory, leap-frogging over alticola, which appears not to... read more
Status and conservation
Not globally threatened. Common. Population appears to be increasing; Breeding Bird Surveys from 1966 to 2005 reveal significant annual increases of 4·2% (North America... read more
Only subscribers are able to see the bibliography. Login or Subscribe to get access to a lot of extra features!