Size: the bumblebee bat, also known as kitti's hog-nosed bat, is the smallest mammal in the world by size. it measures about 1.1 to 1.3 inches (2.8 to 3.3 cm) in length and weighs only around 0.07 to 0.14 ounces unique appearance: bumblebee bats have distinctive physical characteristics. they have a pig-like snout, which gives them the nickname "hog-nosed bat." they also have large, protruding ears relative to their body size. social behavior: bumblebee bats are usually found in small groups or colonies, consisting of a few individuals. these groups can roost together in caves, often hanging from the ceiling. reproduction: female bumblebee bats typically give birth to a single offspring each year. the young bats are born relatively large compared to their mothers, constituting a high proportion of the mother's body weight.