They include deer, rabbits, rodents, squirrels, hares, woodpeckers, owls, foxes and bears. Birds of prey such as Verreaux's eagle owls and martial eagles sometimes prey on piglets. Kangaroo rats are preyed on by coyotes, foxes, badgers, weasels, owls, and snakes. Other known predators include hawks, owls, and foxes. Predators include hawks, owls, and snakes. The Ural owl tends to dominate interspecific conflicts with tawny owls. The barred owl is one of the most common owls in North America. Lesser hunters include kestrels and eagle owls. Natural predators include snakes, water rats, goannas, hawks, owls, and eagles. More often foxes are prey rather than predators for northern "Bubo" owls. Even tropical great horned owls have feathered legs and feet. Almost all fossils indicate these owls were larger than modern great horned owls. Saw-whets are often in danger of being preyed upon by larger owls and raptors. The largest avian prey for barred owls are gamebirds. Some prey killed by great horned owls was estimated to weigh up to .