Wilson's Warbler

Wilsonia pusilla
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Description: Olive green above, yellow below. Males have distinctive black cap.


Song: Rapid series of slurred "chee" notes.

Recording
Produced by: Library of Natural Sounds at the Cornell Laboratory of Ornithology.


Distribution: Breeding range from Alaska south to southern California and western mountain regions to Colorado and northern New Mexico, west across Canadian provinces to Newfoundland south to northern New England and Minnesota. Breeds in moist habitats with dense ground cover.

Winters primarily from northern Mexico to Central America and the Caribbean. Small numbers winter along Pacific Coast and along the coastline of Gulf states.

In the East, migration is circum-Gulf. Typical arrivals on the Texas coast are by third week of April; peaks in Great Lakes region mid-May, arriving in northernmost breeding grounds late May or early June. In the West, appears in Arizona and southern California during first third of March and arrive on northern breeding grounds by late April or early May.


Status: Destruction of lowland riparian thickets and cowbird parasitism have caused disappearance of this species from coastal lowlands of Santa Barbara. Populations in Pacific Northwest have increased, likely due to increased habitat following clear-cutting. Breeding Bird Survey

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