Crows and ravens around here do something called "Hawking" where they dive-bomb birds of prey they consider threats. Smaller birds also do it to crows and hawks.
I have vague recollections of OJ's mostly him branding it. My folks weren't so keen on buying us the sweet kinds. Very occasionally we'd get something sweet, but it was usually Honey Nut Cheerios or Life.
Good for them.
Usually I just go: Fat cats say meow. He could also, sort of, say hello. But he stopped once he realized I'd feed him whether or not he said it.
http://tinyurl.com/yctwuou