I call this a den but it's not a large amount of snakes. I think the concentration around my area is normal. I think the snakes have places like mine all over the area.
I've never seen a mating ball or for that matter any mating going on in the Spring. It may all be taking place under the cover of my deck. With the camera under there I will have more of an idea this Spring.
I guess it will then become the XXX radix cam