I think the need for evidence is on the shoulders of those saying they do burrow. After all, you can't argue with a picture or video of one burrowing into the ground but it doesn't prove anything to show a picture of a bp NOT burrowing into the ground lol. Honestly, I've never seen anything in any of my sources (which I researched carefully) about them burrowing but it does usually mention something about them living in rodent burrows.
