Tell me ure not joking I have never seen them what tree stump lol
In Riverwood, where you talk to Gerdur, Hod and Ralof. On the far western shore of that little island is a stump with ants or termites crawling across it. There are a few other locations where that type of stump is as well, but I can't remember them off hand.
65. Eldersblood Peak