Assertion: black vulture's plumage | /r/HasProperty | featherless
Facets:
Source sentences:
text: They have sooty black plumage, featherless black heads, and white stars under their wingtips.
text: The black vulture gets its name from its deep black plumage, featherless grey-black head, and its short, hooked beak.
text: They have sooty black plumage, featherless black heads, and white stars under their wingtips.