Assertion: greater scaup's head | /r/CapableOf | look dark
Facets:
Source sentences:
text: The male’s head looks dark but has a greenish iridescence in good light.
text: The female shows some grey tones in the mantle which reduce the contrast with the flanks and make the head look dark, while the white around the base of the bill is very extensive and meets over the culmen (Steve Young / www.birdsonfilm.com).
text: The male’s head looks dark but has a purplish iridescence in good light.