World Bird List

Species factsheet
Slaty Vireo (Vireo brevipennis)

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

Voices can be found here (external link)
Subspecies and Distribution
Subspecie Distribution
browni sw Mexico (Guerrero)
brevipennis sw to se Mexico (Jalisco and Colima to Morelos, wc Veracruz and c Oaxaca).
Annoncer