Alagoas Curassow vs Chestnut-bellied Guan

Extirpated from wild (EW). Calls documented from captive birds: a deep, resonant booming similar to Razor-billed Curassow; flocks give low, guttural clucking contact calls.

Produces a loud, resonant honking cackle and wing-whirring display flights. Calls carry through Brazilian interior forest; classified Vulnerable due to habitat loss.

Glossy black body; white lower belly and undertail; massive compressed red bill with orange-yellow tip; no head ornamentation. Now extinct in wild; the large red razor bill was its most …

Dark brownish-black above; bare red throat wattle; neck and breast streaked white on dark; belly and flanks rich uniform chestnut-orange, more saturated than most Penelope guans; tail dark.