Assertion: blue jay's crest | /r/CapableOf | feed nestling
Facets:
Source sentences:
text: When incubating, feeding nestlings, or associating with mate, family, or flock mates, the crest is held down; the lower the crest, the lower the bird’s aggression level.
text: When incubating, feeding nestlings or associating with their mate, family or flock mates, the crest is held down.