Assertion: true duck | /r/CapableOf | mature in first year
Facets:
value: unlike swans
type: OTHER
Source sentences:
text: All true ducks, except those in the shelduck group (the tribe Tadornini) and sea ducks (the tribes Mergini and Somateriini), mature in the first year and pair only for the season—unlike the late-maturing, life-mating true geese and swans.