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. Some bats have evolved a highly sophisticated sense of hearing. They emit sounds that bounce off of objects in their path, sending echoes back to the bats. From these echoes, the bats can determine the size of objects, how far away they are, how fast they are traveling, and even their texture all in a split second. For their size, bats are the slowest reproducing mammals on Earth.