The largest bats are the flying foxes, one of which has a six foot wing span. Bats eat a large variety of foods. Different species of bats consume fish, frogs, insects, fruits, small mammals and even other bats. Only 3 species of bats are vampire bats, they are found in Central and South America, these bats feed on the blood of birds and mammals. Many tropical bats are sometimes called keystone species.
Many plants rely on bats to spread their seeds and to pollinate flowers.
Some of these plants include columnar cacti, bananas, mangoes, cashews, dates, figs, and agave. Agave is used to produce tequila, the seed production in this plant drops substantially without bats as pollinators. Salt peter used in artillery shells was once made from bat guano. Contrary to popular belief bats have very good eyesight. Bats reproduce very slowly, most females have only one pup per year.