Assertion: eider's bill | /r/HasAspect | deep white grooves
Facets:
Source sentences:
text: The bill was large at 11 cm (4 1⁄ 2 in) long and curved downward at the top;(p28) the bill also had deep white grooves in both the upper and lower mandibles, up to seven on the upper mandible and twelve on the lower mandible in summer, although there were fewer in winter.(p29)