Did you know - Each Brown Bat can consume 600 mosquitoes in an hour? WHY HOUSE BATS: Bats feed on night-flying species of insects such as mosquitoes, corn borers and cutworm moths. While actual number of insects caught varies according to the size of the insects, laboratory studies have shown that a single little brown bat can consume 600 or more mosquitoes in an hour. Bats DO NOT interfere with attracting wild birds.