I work at a zoo in Colorado and we’ve found these beetles in the dung of both our orangutans and gorillas. They seem to be of the burrowing type, as I’ve never seen them make balls. They are small (only about 1/4 inch in length). Any idea what they are? Thanks!
This appears to be Aphodius fimetarius, a small Dung Beetle that has been reported from Colorado on BugGuide.