Most reptiles of the squamatan order (lizards and snakes) reproduce sexually, but parthenogenesis has been observed to occur naturally in certain species of whiptails, some geckos, rock lizards, Komodo dragons and snakes. Some of these like the mourning gecko "Lepidodactylus lugubris", Indo-Pacific house gecko "Hemidactylus garnotii", the hybrid whiptails "Cnemidophorus", Caucasian rock lizards "Darevskia", and the brahminy blindsnake, "Indotyphlops braminus" are unisexual and obligately parthenogenetic. Other reptiles, such as the Komodo dragon, other monitor lizards, and some species of boas, pythons, filesnakes, gartersnakes and rattlesnakes were previously considered as cases of facultative parthenogenesis, but are in fact cases of accidental parthenogenesis.