* Birds of prey: Hawks, owls, and even some wading birds like herons can prey on salt marsh harvest mice.
* Mammals: Raccoons, foxes, and even larger rodents like muskrats can hunt these mice.
* Snakes: Garter snakes and other non-venomous snakes that inhabit the salt marsh environment are also predators.
The salt marsh harvest mouse's small size, vulnerability, and habitat all contribute to making it a target for a variety of predators.