The cross and red foxes differ from each other only in colour, being of the same shape and size.

Their shades of colour are not disposed in any determinate manner, some individuals approaching in that respect very nearly to the silver fox, others exhibiting every link of the chain down to a nearly uniform deep or orange-yellow, the distinguishing colour of a pure red fox.

It is reported both by Indians and traders, that all the varieties have been found in the same litter.
The blue fox is seldom seen here, and is supposed to come from the southward.

The gray wolf (_mahaygan_) is common here.

In the month of March the females frequently entice the domestic dog from the forts, although at other seasons a strong antipathy seemed to subsist between them.