Assertion: tropic bird's wing | /r/HasProperty | small
Facets:
Source sentences:
text: The wings are small, as they are forest-dwelling birds who only need to travel short distances, and are often of about the same span as the bill-tip-to-tail-tip measurements of the bird.
text: The vestigial wings are so small that they are invisible under the bristly, hair-like, two-branched feathers.