Ravens are marvelously smart animals. One study found that the birds have a social structure previously seen only in humans, and any given group of the animals will have a complex network of emotional relationships that could otherwise only be found in a Brooklyn polycule.

As a result, you can fairly easily teach the birds to perform complex tasks. For example, this dude taught a raven how to play Tic Tac Toe. Either this bird is really smart, or this dude is just shit at Tic Tac Toe.