A pair of coyotes I spotted from a gravel road some yrs back. They are almost 1/2 mile away from where I took their picture. Pic was taken late January if I recall? I've watched a few pair of coyotes dig or cleanout a den hole. From what I could tell based on (size alone). I believe both instances, it was the male that did most of the digging. I also happen to believe. It is the female who picks out & initiates the digging. Then the male takes over the digging. Like the Red Fox. Both canines may take over an old badger den or ground hog den hole. Otherwise they dig their own. A few times out on a field 1/4 mile plus. I've found what I call "digs". Where a coyote or Red Fox. Will start to dig a den hole from scratch. Then suddenly abandon that dig. Then start another dig a few feet away. Sometimes it is easy to sort out. What critter initially dug a dig or a den hole. By looking at the very top edge of that hole. To see if it looks like an inverted V. That inverted V on the top edge. Is indicative of a canine dig. From what I've seen of both canine digs & den holes. Fox dens I have seen. Typically the maximum height of the hole is roughly 10-12" in height. Coyote den holes are typically a bit taller. Around 14" on average in height.