One thing I discovered about having a lot of birds and an outside aviary, was exotic birds that have escaped from their owners, find you.
I was on my own back porch, minding my own business, when a bird landed on my head. That in its self is really not unusual. I have released many wild birds that have come back, landed on me and begged to be fed, like babies. Starlings are great for begging for food, all their lives. BUT This guy bit me on the head. When I went to shoo him off my head he bit my hand. A friend named Bink, was on the porch at the time and said "Step UP". Which the bird did, then bit his hand?
Time passed, no one claimed him and Obnoxious stayed the grouch he was from the first encounter. Eventually, Bink adopted this grouch in the sky and they are great pals and yes, Obnoxious still bites the hand that feeds him.
I have a sneaking suspicion that Obnoxious was not an escapee, rather an evictee.