Largest organisms found to have measured in length. The Komodo dragon ("Varanus komodoensis"), also known as the "Komodo monitor", is a large species of lizard found in the Indonesian islands of Komodo, Rinca, Flores, Gili Motang, Nusa kode and Padar. A member of the monitor lizard family (Varanidae), it is the largest living species of lizard, growing to a maximum length of in rare cases and weighing up to approximately . The following is a list of the heaviest living reptile species ranked by average weight, which is dominated by the crocodilians. Unlike mammals, birds, or fish, the mass of large reptiles
Roughneck monitor lizard Roughneck monitor lizard The black roughneck monitor lizard, "Varanus rudicollis", is a species of monitor lizard found in Southeast Asian countries of Thailand, Burma, and Malaysia. It is also found in Indonesia on Sumatra and islands of the Riau Archipelago It is sometimes known simply as the roughneck monitor lizard. In Thailand is called "h̄èā cĥāng" (; "elephant bark"). The habitat of "Varanus rudicollis" is limited to primary and secondary rainforest and mangrove swamps. In the wild the black roughneck monitor is very rarely seen, but whether this is because of its rarity or its very secretive behavior is uncertain.