Birds don’t fart, neither do sloths, and other secrets of #DoesItFart.

WHAT DOES A CREATURE NEED IN ORDER TO FART?

Ethan Kocak: Mostly a butthole.

Dani Rabaiotti: They need a hole at the opposite end to their mouths. That’s probably the main thing. It doesn’t have to be a butt, necessarily. There are all different sorts of ducts, cloacas — as long as it has some sort of hole at the opposite end to its head, where gas can come out.