Canadian geese which roam during the late hours of the night, terrorizing second shift workers, late-night Wal-Mart shoppers and other night denizens everywhere with their attacks. A bite will not turn you, but it will definitely piss you off.
Vampire Goose: "HISS!"
QT Worker 1: "Ow! Something just bit me in the ass!"
QT Worker 2: "These fucking vampire geese man, they never sleep!"