I’m surprised there aren’t more crows on the list - I dont know any locally that ride inside the bus (not allowed) but local flocks, especially ones with a lot of old crows, will ride around on top of the busses to get around town (the local busses are all hybrids, and the battery(?) cases on the roof provide an alcove sheltered from the slipstream where they ride). They’ll also catch rides on passing bike trailers.