There are 4 classified phases of the red fox. The main one is red, then cross, then silver, then black. This guy is nearly all black as a silver fox has silver guard hairs from head to tail, and this guy only has them on his rump. Silver fox are more prominent up north, but still average less than 2% of the local population. Black fox are even more rare.

Silver fox are very common in the fur industry, several farms strictly grow silver fox, and you will see silver fox fur coats all over the place. Do a search on google or ebay for silver fox and you will be surprises. most all black fox fur garments are dyed fox as there are not enough in the wild to supply the demand.