World Bird List

Species factsheet
Cassin's Vireo (Vireo cassinii)

Order: Vireo cassinii
Family: Vireos, Greenlets, Shrike-babblers (Vireonidae)

Voices can be found here (external link)
Subspecies and Distribution
Subspecie Distribution
cassinii sw Canada through w USA to n Baja California (nw Mexico)
lucasanus s Baja California (nw Mexico)
Annoncer