The face is covered with corrugations or caruncles and should be red in color.
The head and caruncles on the neck of the male are, when excited, of the same blue and scarlet hues.
The caruncles of some laboratory specimens became worn before finally dropping off.
Having fleshy excrescences somewhat resembling the caruncles of birds.
The bill is orange and black, the caruncles on his forehead orange, and the cere orange; the orbits scarlet, and the irides white.