World Bird List

Species factsheet
Thick-billed Kingbird (Tyrannus crassirostris)

Order: Tyrannus crassirostris
Family: Tyrant Flycatchers, Calyptura (Tyrannidae)

Voices can be found here (external link)
Subspecies and Distribution
Subspecie Distribution
pompalis se Arizona (sw USA) and w Mexico
crassirostris sw Mexico and w Guatemala
Annoncer