Who are a garter snake's predators?

As for most snakes, Garter snakes have other animals that will eat it. Foxes, birds, coyotes and other mammals closely related to foxes and coyotes will eat Garter snakes. It's 'enemies' are its predators or even humans can be a threat to snakes. Garter snakes can even be a threat to humans if overpopulated in one place, for example 20 Garter snakes in a person's backyard can be a hazard to ones health especially to infants or babies.