Crows and Magpies are very smart, and they'll do some really strange things to amuse themselves. Here are 2 Magpies deliberately provoking a fight on the street between 2 cats, and it's quite evident that the Magpies are doing it simply for their own entertainment, looking for a little excitement on their time off from doing the usual basic survival and territorial stuff that generally occupies birds. They are willing to risk considerable danger to themselves in order to have some raucous and unholy fun at the cats' expense.

Magpies and cats