This is some mating dance -- like the elaborate gang-handshakes we used to think up when we were stoned, but a thousand times sillier, with funny noises, beak-fencing, and a lot of general bobbing up and down.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.