another critter -- the dragonmouse

Dragonmice may have the head and wings of a dragon, and body and tail of a mouse -- or  the ears, paws, and tail of a mouse, and body of a dragon.

They hoard, of course -- they get the trait from both parents, so expect small items to go missing. If you see droppings on the kitchen counter and your cat's whiskers are singed, you probably have dragonmice. If you keep one as a pet and carry it in your pocket, it'll burn holes in your clothes. They start fires in the walls of houses, not only by chewing wires, but also directly by their flaming breath.