 Bechstein's bat feeds chiefly on flying prey such as moths, dipterans, neuropterans and other small nocturnal insects.Analysis of droppings from the Isle of Wight and Wiltshire shows a diet consisting of dung flies, grasshoppers, nut weevils, and moths.Populations cut off from forest land are recorded to shift to a diet of terrestrial insects and spiders caught from the ground.