Family New World Warblers (Parulidae)

Least Concern

Wilson’s Warbler (Cardellina pusilla)


Taxonomy

French: Paruline à calotte noire German: Mönchswaldsänger Spanish: Reinita de Wilson
Taxonomy:

Muscicapa pusilla

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).
  • Descriptive notes

    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

    Voice

    Song a series of staccato "chip" notes, with some regional variation: nominate race sings... read more

    Habitat

    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

    Breeding

    Season Apr–Jul, exceptionally to early Aug, egg-laying mostly Jun; some Pacific coast populations appear to be regularly double-... read more

    Movements

    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

    Recommended citation

    Curson, J. & de Juana, E. (2019). Wilson’s Warbler (Cardellina pusilla). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from https://www.hbw.com/node/61522 on 24 January 2019).