Bats are the only flying mammals. (Flying squirrels only glide.) Most bats in the North America eat insects. As a matter of fact, one bat eats about 2,000 to 6,000 insects each night. Many of the insects they eat include agricultural crop pests including the tomato horned worm, corn earworm, and many kinds of beetles. Bats also eat annoying insects like flies, mosquitoes, and gnats.
Bats live a very long time. Most bats live between 10 and 20 years. Some bats typically live to 30 years old. The oldest known bat was recently recaptured in Europe at 41 years old. When winter comes, some bats migrate to warmer climates. Other bats find a cave or mine to spend the winter. Hibernation allows them to avoid freezing temperatures.
During hibernation, a bat’s heart pumps about 11 beats a minute. In contrast, when bats are awake and flying, their heart pumps over 1,000 beats a minute.