Assertion: american crow's plumage | /r/HasProperty | coloured
Facets:
value: brightly
type: MANNER
value: due to iridescence
type: CAUSE
value: often
type: TEMPORAL
Source sentences:
text: The plumage of the starling is often brightly coloured due to iridescence; this colour is derived from the structure of the feathers, not from any pigment.