Foxes introduced for hunting, or escaped from fur farms, pose significant threats due to interbreeding, competition for resources, and disease transmission. Sierra Nevada red foxes are also endangered ...

the regular exposure to off meat and other foods has contributed to the red fox developing a more sophisticated immune system. This enables the fox to combat a much wider variety of diseases and ...

The animals have always been on the Island, but "over the last decade or so their population has grown substantially." ...

Habituation of foxes to humans and human food sources may subject them to dog attacks, dog diseases and vehicle collisions. Active mostly at night, Sierra Nevada red foxes spend winters in dens in ...