They emit sounds which bounce back as echoes. An echo can tell a bat where an insect or any other object is located. Beneficial Bats Bats are important predators of night-flying insects.
Many tropical bats pollinate plants and help spread seeds.
Bat droppings, or guano, can be used as fertilizer. Many eat insects. Some bat species in other countries eat fruit or nectar and even fish. Vampire bats, a small group that lives in Central and South America, feed on animal blood. Like all mammals, young bats feed on mother's milk.