Assertion: raven's bill | /r/HasAspect | deep nasal grooves
Facets:
value: with only light nasal bristle
type: OTHER
Source sentences:
text: This bill, the largest of any passerine at 8–9 cm (3.1–3.5 in) in length, is black with a white tip and has deep nasal grooves with only light nasal bristle covers.