They have several natural predators, including snakes, raccoons, cats, squirrels, hawks, and owls, which raid their nests, and competing birds who nest in their houses if given the opportunity (particularly House Sparrows and Starlings).
(They; have; several natural predators, including snakes, raccoons, cats, squirrels, hawks, and owls) (owls; raid; their nests) (competing birds who nest in their houses; given; the opportunity) Context(competing birds who nest in their houses given,List([127, 176))):(competing birds; nest; L:in their houses)
competing birds who nest in their houses given,List([127, 176))
They owls competing birds who nest in their houses competing birds
have raid given nest
several natural predators, including snakes, raccoons, cats, squirrels, hawks, and owls
their nests
the opportunity
L:in their houses