A most interesting thread. As long as we're telling animal stories, I have one to offer, though it's not quite in the same vein as the O.P.
My husband likes to feed the crows that inhabit our neighborhood. I'm not a fan of crows, since they seem to keep other birds away. I call them his "crow buddies."
The crows will sometimes caw in the morning (a most unpleasant sound) in hopes that my husband will give them something - usually food that's stale, like old bread, crackers, etc. Well, about six weeks ago, a crow dropped something on the ground, which fell right next to where my husband was standing in the backyard. It was a cherry, and it was unblemished. My husband got the impression that the crow gave him a little gift, as payback for the food that he gives them. Maybe that's not what it was. But then crows are quite intelligent.