Assertion: cockatiel's patch | /r/CapableOf | cover some of the face
Facets:
Source sentences:
text: Several species have a brightly coloured bare area around the eye and face known as a periophthalmic ring; the large red patch of bare skin of the palm cockatoo is the most extensive and covers some of the face, while it is more restricted in some other species of white cockatoo, notably the corellas and blue-eyed cockatoo.