We have black bears in our area but, I've never seen one or any sign. Coons and possum can be troublesome. In my first post, you can see a funnel shaped squirrel baffle, on the shepherd hook support. Does a pretty good job at defeating most varmints. When that fails, I trap them with a paw trap, designed for coons. Then it's a 22 LR head shot, to end the raiding.
BTW, haven't seen the orioles, for the last three days. Moved on to greener pastures.