He has plenty of "company"- hahaha! But BPs are rather poor at hanging onto things, so climbing up or down is more of a challenge, due to their body shape-plus shelves probably don't really have anything for them to hang onto.* That's one thing that's cool about rat snakes (incl. corn snakes)- they slide along branches pretty gracefully, & even rest comfortably on them- they've got the right body build for it though. *You can likely improve the available traction for yours with simple additions.