Alagoas Curassow vs Salvin's Curassow

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 deep, resonant booming call. Calls carry through Colombian and Ecuadorian Amazonian forest; the deep boom is the standard territorial call of the Mitu curassow genus.

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 …

Glossy black overall; lower belly and vent white; large compressed red bill with pale yellow tip; no crest or knob. Virtually identical to Crestless Curassow; white lower belly and red …