World Bird List

Species factsheet
Wilson's Warbler (Cardellina pusilla)

Order: Cardellina pusilla
Family: New World Warblers (Parulidae)

Danske navn: Sortkronet Sanger

Voices can be found here (external link)
Subspecies and Distribution
Subspecie Distribution
pileolata Alaska, wc Canada and interior w USA
chryseola coastal sw Canada and coastal w USA
pusilla c and s Canada, ne USA