FIELD MARKS-   The male is black with a curly crest, a white belly, and a yellow knob on its bill.There are three morphs of female Great Curassows  Barred morph females with barred neck, mantle, wings and tail, rufous morph with an overall reddish brown plumage and a barred tail, and dark morph female with a blackish neck, mantle and tail the tail often faintly vermiculated, and some barring to the wings
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<p><a rel="nofollow" class="external text" href="https://www.flickr.com/photos/cuatrok77/7170971931/">Great Curassow</a>
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