Birdthings are a type of creature that likes to live in the margins of my notes and handouts.

They're kind of obnoxious; Birdthings are typically loud and fond of playing music on instruments they can't play. A lot of them are also a strange sort of anglophile that wears top hats, drinks tea, and pretends to be posh English Birdthings.

Do not allow the Birdthings into your home unless you are prepared and have Birdthing-proofed everything.