Assertion: toucan's bird | /r/HasAspect | duller plumage
Facets:
Source sentences:
text: Immature birds have a duller plumage.
text: Immature birds have a duller plumage and a shorter bill.
text: Juvenile birds are sooty-black, and have duller plumage, particularly with respect to the bib, red border, and lower mandible.