Assertion: mallard's bill | /r/HasProperty | white square
Facets:
value: on the wings
type: LOCATION
value: in flight
type: TEMPORAL
Source sentences:
text: The female gadwall (A. strepera) has an orange-lined bill, white belly, black and white speculum that is seen as a white square on the wings in flight, and is a smaller bird.:506 More similar to the female mallard in North America are the American black duck (A. rubripes), which is notably darker-hued in both sexes than the mallard, and the mottled duck (A. fulvigula), which is somewhat darker than the female mallard, and with slightly different bare-part colouration and no white edge on the speculum.
text: The female gadwall (A. strepera) has an orange-lined bill, white belly, black and white speculum that is seen as a white square on the wings in flight, and is a smaller bird.