Yes red fox are native all over North America. They were also imported form Britain and released during colonial times. There was a dna study done a few years ago trying to compare dna of populations throughout the east to see how much intermingling and which populations were dominant, etc. Not sure how that turned out.
What surprises me about this photo, is that a red fox would actually kill another fox. Reds are very timid. That is one reason they are so thoroughly wiped out of areas with coyotes. Grey fox are much smaller than reds, but they 10x the attitude. I have never seen or heard of a red bothering a grey. I trap fox and coyotes and have a lot of up close interaction with all three species.
Readonly,
Perhaps part of the reason greys are not bothered is they can climb to avoid predation?
Part of my understanding is the reds were brought over from GB as you noted because they will go to ground and some of the original British settlers wanted that instead of their hounds being "outfoxed" by the native greys? Going to ground in front of a coyote would not be a good thing for any smaller canid.
Geno
