Lesser long-nosed bat

Lesser long-nosed bats are relatively small bats, with a total length as adults of around 8 centimetres (3.1 in), and weighing between 15 and 25 grams (0.53 and 0.88 oz), depending on the time of year. Males and females are similar in size, and virtually indistinguishable. As their common name implies, they have a long, narrow snout, and this terminates in a small triangular nose-leaf. While they do have three internal caudal vertebrae, they have no visible tail. The tongue of lesser long-nosed bats has a number of adaptations for lapping nectar, including long ridges and rough, conical papillae, which may also help protect against periodontal disease by scraping the teeth clean. Their wings have a high wing loading, allowing for energy efficient long-distance flight in open habitats, at the expense of manoeuvrability. Only three other species of North American bat have a nose-leaf, and two of these, the Mexican long-tongued bat, and the California leaf-nosed bat, have a distinct tail, and also, in the latter case, much larger ears than lesser long-nosed bats do. They are more easily confused with their close relatives, the greater long-nosed bats, but, in addition to being about 10% larger, the latter have shorter, greyish fur, and proportionately longer wings. Adult lesser long-nosed bats are yellow-brown or grey above, with rusty brown fur below. Their ears are small.