Its marshes are home to the endangered species Salt Marsh Harvest Mouse. Other wildlife seen here include fox, hare and harvest mouse. The eastern harvest mouse diet is not well known. Domestic and feral cats are a threat to the western harvest mouse. The range of the eastern harvest mouse is wide across the North American continent. Finally, the house mouse has incisors without grooves, unlike those of the western harvest mouse. The eastern harvest mouse mates during spring and autumn. The endangered salt marsh harvest mouse is also thought to be present. Mammals on the reserve include harvest mouse, water vole and European hare. Other mammals include the harvest mouse, the ground squirrel, and the ornate shrew. The harvest mouse ("Micromys minutus") is a small rodent native to Europe and Asia.