French: Paruline à calotte noire German: Mönchswaldsänger Spanish: Reinita de Wilson
A. Wilson, 1811,
southern New Jersey, USA.
Races form W and E groups, which differ clearly in DNA#R. Three subspecies recognized.
Subspecies and Distribution
C. p. pileolata
(Pallas, 1811) – Western Wilson's Warbler – N Alaska S along coast to C British Columbia, including Queen Charlotte Is, also in W USA S in Rockies to N New Mexico and in coastal mountain ranges to C California; migrates to region from NW Mexico S to W Panama.
C. p. chryseola
(Ridgway, 1902) – Pacific coast and W slope of coastal mountain ranges from SW British Columbia S to S California; migrates to region from NW Mexico (including Baja California) S to Panama.
C. p. pusilla
(A. Wilson, 1811) – Eastern Wilson's Warbler – C & S Canada (Mackenzie district of Northwest Territories and N Alberta E to Newfoundland and Nova Scotia) and NE USA (New England); migrates to region from E Mexico S to Costa Rica, also extreme S USA (extreme SE Texas and SW Gulf coast).
11·5–12 cm; 5·4–10·5 g. Male nominate race has solid black cap, yellow forehead and face (washed olive on ear-coverts), isolating dark eye;... read more
Song a series of staccato "chip" notes, with some regional variation: nominate race sings... read more
Breeds in various wooded habitats, including open coniferous and mixed forest, especially boggy... read more
Food and feeding
Feeds mainly on insects and spiders (Araneae); occasionally eats berries and the honeydew produced by scale insects (Coccoidea) in winter.... read more
Season Apr–Jul, exceptionally to early Aug, egg-laying mostly Jun; some Pacific coast populations appear to be regularly double-... read more
Medium-distance to long-distance migrant. Leaves breeding grounds from early Aug, arriving on... read more
Status and conservation
Not globally threatened (Least Concern). Generally common throughout range, and abundant in parts of W North America; less common in much of E. Estimates of breeding density... read more
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