Assertion: trumpeter swan's neck | /r/HasAspect | few feathers
Facets:
value: as an adaptation for hygiene
type: PURPOSE
Source sentences:
text: The condor's head and neck have few feathers, and the skin of the head and neck is capable of flushing noticeably in response to emotional state, a capability that can serve as communication between individuals.
text: As an adaptation for hygiene, the condor's head and neck have few feathers, which exposes the skin to the sterilizing effects of dehydration and solar ultraviolet light at high altitudes.
text: The head and neck, kept meticulously clean, are red to blackish-red, and have few feathers.