Some of the largest and biologically richest tropical forests remaining in the world are found among the 600 islands of Papua New Guinea. These forests support a diverse bat fauna, with 91 native species ranging from the greater flying fox, with a wingspan of 1.6 meters, to the tiny, 2.5-gram lesser sheath-tailed bat. Nineteen of Papua New Guinea's bat species are found nowhere else on Earth. Bats of Papua New Guinea is a handy, portable field guide to these fascinating flying mammals, which play crucial ecological roles as pollinators, seed dispersers, and insect predators.