Yotebuster
This question seams simple but I do not think it is.
I am starting to think coyote use old den sites and other types of holes to get out of the heat or cold, get away from bugs and escape danger or just go to sleep in them more often then most people think.
Is there any information you have that would support this? I have never read any, but I talked to a friend in Kansas that said there dogs sometimes run them in pipes and other types of hide outs when pursued, this indicates to me they were in these spots at least one time before or they would not end up in these places.