Assertion: mallard | /r/CapableOf | interbreed with american black duck
Facets:
value: frequently
type: TEMPORAL
value: in the genus
type: OTHER
Source sentences:
text: Mallards frequently interbreed with their closest relatives in the genus Anas, such as the American black duck, and also with species more distantly related, such as the northern pintail, leading to various hybrids that may be fully fertile.