Ceratopogonidae is a family of flies commonly known as no-see-ums, or biting midges, generally 1–3 millimetres (1⁄16–1⁄8 in) in length. The family includes more than 5,000 species, distributed worldwide, apart from the Antarctic and the Arctic. Larvae need moisture to develop, but also air and food. They are not strictly aquatic or terrestrial.