Assertion: duck's predator | /r/CapableOf | threaten nestling
Facets:
Source sentences:
text: In North America, adult mallards face no fewer than 15 species of birds of prey, from northern harriers and short-eared owls (both smaller than a mallard) to huge bald and golden eagles, and about a dozen species of mammalian predator, not counting several more avian and mammalian predators who threaten eggs and nestlings.