Sierra Nevada red fox pups reach sexual maturity in their first year ... POPULATION TREND: While the exact population of Sierra Nevada red foxes is unknown, a rapid reduction in its size over the past ...

“The Sierra Nevada red fox is a vanishing emblem of remote Sierra wilderness ... These foxes are jeopardized by inbreeding depression due to small population size and hybridization with nonnative red ...

The red fox is the only animal which is known to use the Earth’s magnetic field to hunt. It’s thought to be able to sense it using a protein in its eyes called cryptochrome. With fine warm ...