Komodo dragon at London Zoo, late 1920s. The Komodo dragon (Varanus komodoensis) is the largest lizard in the world, growing to an average length of 2-3 meters (10 feet). In the wild large adults tend to weigh around 70kg (154 pounds). Captive specimens often weigh more. The largest verified specimen was 3.13 meters (10 feet 3 inches) long and weighed 166kg (365 pounds) including undigested food. It is a member of the monitor lizard family, Varanidae, and inhabits various islands in Indonesia. 固opFoto / Fortean