Pipistrellus is a genus of small bats commonly known as pipistrelle bats. They are found in various regions around the world, particularly in Europe, Asia, and Africa. These bats are known for their agility in flight and their ability to navigate using echolocation, which helps them locate insects, their primary food source. Pipistrellus species typically have a wingspan of about 20 to 25 centimeters and weigh between 5 to 15 grams. They roost in buildings, trees, and other sheltered areas, often forming small colonies. Their populations are important for controlling insect populations and maintaining ecological balance.