Large mammals:
* Wolves: Wolves are apex predators and can hunt foxes, especially in areas where their ranges overlap.
* Bears: Both black bears and grizzly bears can prey on foxes, especially when other food sources are scarce.
* Mountain lions: These large cats can hunt foxes, especially in areas where their ranges overlap.
* Bobcats: Bobcats are smaller than mountain lions, but they can still hunt foxes.
* Coyotes: Coyotes and foxes compete for food and territory, and coyotes may occasionally kill and eat foxes.
Other predators:
* Eagles: Large eagles, such as golden eagles, can carry off foxes, especially young or weak ones.
* Hawks: Hawks, particularly red-tailed hawks, can sometimes prey on foxes, particularly young kits.
* Owls: Great horned owls are large enough to take down adult foxes.
* Snakes: Some large snakes, such as boa constrictors and pythons, can prey on foxes.
Other threats:
* Humans: Foxes can be hunted by humans for sport or because they are considered pests.
* Disease: Foxes are susceptible to a variety of diseases, some of which can be fatal.
Important note: The specific predators of foxes can vary depending on their location and the local ecosystem.