About Tigrisoma mexicanum Swainson, 1834
This species, Tigrisoma mexicanum Swainson, 1834, has a bare throat that ranges from greenish-yellow to orange across all plumage types. Adults have a black crown, light grey sides of the head, and blackish feathers with narrow buff barring on the neck sides and upperparts. A median stripe running down the fore-neck is white, bordered with black, and the rest of the underparts are dull cinnamon brown. Juveniles are buff with coarse black barring, with more mottling and vermiculation on the wings; the throat, median underparts, and belly are whitish. The flight of this species is heavy. Its common call is a hoarse howk-howk-howk. Males also produce a booming hrrrowwr! call, particularly at sunset. When this booming call is emitted, the beak opens wide, and undulations are visible along the throat from the mid-thorax to the caudal end.
