Assertion: swan | /r/HasAspect | rounded head shape
Facets:
value: with variable bill pattern
type: OTHER
Source sentences:
text: Bewick's swan is similar in appearance to the parapatric whooper swan (C. cygnus), but is smaller, shorter-necked and has a more rounded head shape, with variable bill pattern, but always showing more black than yellow and having a blunt forward edge of the yellow base patch.