1. Wolves: Wolves are the most significant predators of red foxes. They are stronger and larger than foxes and can easily overpower them.
2. Coyotes: Coyotes are another significant predator of red foxes. They are smaller than wolves but still more formidable than foxes.
3. Bears: Bears are also predators of red foxes, although they do not typically hunt them specifically. Bears may kill foxes if they come across them while searching for other food sources.
4. Eagles: Eagles are birds of prey that can hunt and kill red foxes. They typically target young or sick foxes.
5. Bobcats: Bobcats are medium-sized wild cats that can prey on red foxes. They are not as common as other predators on this list but can still pose a threat to foxes.
6. Cougars: Cougars are large wild cats that can prey on red foxes. They are not as common as other predators on this list but can still pose a threat to foxes.
7. Great horned owls: Great horned owls are large owls that can hunt and kill red foxes. They typically target young or sick foxes.
8. Other red foxes: Red foxes may also compete with each other for food and territory, and this competition can sometimes lead to violence.