Monster: Stinkbat (Patreon)

This is a little flying creature that can quickly camouflage itself against almost any surface. It's named for its distinctive defensive ability that allows it to escape from harm.

These originated during a session of a long D&D campaign. The player characters returned from travel to find that several of these had taken up residence within one room of their house thanks to the "help" of a certain prank-loving sprite.