There are parts of suburban Los Angeles (Palos Verdes, Rolling Hills, San Marino, Pasadena) where peacocks are a nuisance. They are large, loud, messy, and aggressive, but the city governments don't let residents mess with them. There are wild peacocks roaming parts of the Imperial Valley near the Mexican border, but I don't know if they are legal to shoot. They are not listed in the regs as upland game.