About Crax blumenbachii Spix, 1825
The red-billed curassow, with the scientific name Crax blumenbachii Spix, 1825, is a large bird that grows to between 82 and 92 centimetres (32 to 36 inches) in length. Males have pure black upper plumage, a large black crest, and white underparts. Bright red wattles and knobs are present at the base of the male's bill. Males can be told apart from two related curassow species: they are less bluish-black than the wattled curassow (Crax globulosa), and less purplish-black than the black curassow (Crax alector). Females do not have wattles. They have black upper parts, a crest barred with black and white, reddish-brown wings that are both barred and mottled with black, and underparts that are reddish-brown or ochre.
