Assertion: auk's wing | /r/HasProperty | black
Facets:
value: with thin white trailing edge
type: OTHER
value: with a thin white wing bar
type: OTHER
Source sentences:
text: The wing coverts and flight feathers are very dark gray with paler fringes, and the closed wing is pale gray and black, with a thin white wing bar.
text: Wings are black with thin white trailing edge, visible when folded, and dark underwings.