The bat's wing anatomically resembles the human hand, with extremely elongated fingers and a wing membrane stretched between. Almost 1,000 bat species can be found worldwide. The largest bats have a 6 foot wing span. The bodies of the smallest bats are no more than an inch long. While some bat populations number in the millions, others are dangerously low or in decline.
Most bats live longer than most mammals of their size.
The longest known lifespan of a bat in the wild is 30 years for a little brown bat. Bats can be found almost anywhere in the world except the polar regions and extreme deserts. Bats find shelter in caves, crevices, tree cavities, and buildings. Bats specialize in different foods. Seventy percent of all bats consume insects.