Assertion: eagle's beak | /r/HasProperty | grey
Facets:
Source sentences:
text: Their backs are bright brown or grey-brown with bright feather edges, their beak being grey and legs – dull yellow; after 4 months the thigh feathers transform from the immature fluff to the ‘adult’ form.
text: Adult eagles’ feathering is usually deep black, with a yellowish face, beak being grey and yellow.