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American Bullfrog
Look for American bullfrogs in ponds, lakes and freshwater aquatic habitats. The native range of the American bullfrog is the eastern 2/3's of the United States, east of the Rocky Mountains. American bullfrogs have been introduced in the West, where they are an invasive exotic.
The introduction of the American bullfrog in the Pacific Northwest has contributed to the population decline of the endangered Oregon spotted frog and the California red-legged frog in the Pacific Northwest and the Chiricahua leopard frog in the Southwest. These smaller frog species are preyed upon by the bullfrog for food.
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Beaver
Beaver teeth grow continuously throughout their lives and beavers must gnaw on trees to keep their teeth from getting dangerously long.
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Gray Fox
Throughout the continental United States, except for parts of the Northwest. Gray foxes prefer wooded areas and fields for foraging.
Gray foxes are excellent climbers and will use this ability to avoid predators, hunt and on occasion, den in the hollows of trees.
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Red Fox
Red foxes have excellent hearing. They can hear low-frequency sounds and rodents digging underground.
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Striped Skunk
Striped skunks live in woodlands, grassy plains, and the desert. Look for them throughout the continental United States.
Due to the foul smell of its spray, not many animals eat striped skunks. Only large predatory raptors, such as the great horned owl and the red-tailed hawk, are quick enough to surprise skunks before they spray.
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Turkey Vulture
Turkey vultures are great scavengers, because they have one of the strongest noses of all birds. Their sense of smell can locate dead animals, even as small as rodents, while in flight above a forest.
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