Wilson's Warbler (Cardellina pusilla)
Warblers
Uncommon
Fall and Spring
Wilson's Warbler, male - Mojave Desert, CA
© Tom Benson
Wilson's Warbler, female - CSU San Bernardino
© Tom Benson
The Wilson's Warbler is an uncommon spring and fall migrant on campus in April-May and August-October. It is a common spring and fall migrant in southern California, and is an uncommon breeder in the mountains during summer. The sycamore trees that line the front of campus are often the best places to find flocks of migrant warblers.
High Count: 6, Average Count: 1-3
Wilson's Warblers can be identified by their completely bright yellow bodies with glossy black caps. Some females or immature males may lack the black cap.