There is an allied species, having a bare carunculated head, which has been called Paradigalla carunculata.
"The Malay Archipelago" by Alfred Russell Wallace
They have also a naked carunculated skin round the eyes, and the skin over the nostrils swollen.
"Darwinism (1889)" by Alfred Russel Wallace
The skin over the nostrils swollen, not wattled; naked skin round the eyes, broad, slightly carunculated.
"The Variation of Animals and Plants Under Domestication, Vol. I." by Charles Darwin
Notice the long, horizontal body and the rough or carunculated face.
"Ducks and Geese" by Harry M. Lamon
The Muscovy Duck, which is of a different species, has a bare face with a carunculated red skin.
"Our Domestic Birds" by John H. Robinson