The Burmese python (Python bivittatus) is one of the largest species of snakes. It is native to a large area of Southeast Asia and is listed as Vulnerable on the IUCN Red List. Until 2009, it was considered a subspecies of the Indian python, but is now recognized as a distinct species. It is an invasive species in Florida as a result of the pet trade. Description The Burmese python is a dark-colored non-venomous snake with many brown blotches bordered by black down the back. In the wild, Burmese pythons typically grow to , while specimens of more than are unconfirmed. This species is sexually dimorphic in size; females average only slightly longer, but are considerably heavier and bulkier than the males. For example, length-weight comparisons in captive Burmese pythons for individual females have shown: at length, a specimen weighed , a specimen of just over weighed , a specimen of weighed , and a specimen of weighed . In comparison, length-weight comparisons for males found: a specimen of weighed , weighed , a specimen of weighed , and a specimen of weighed . In general, individuals over are rare. The record for maximum length of Burmese pythons is held by a female that lived at Serpent Safari for 27 years. Shortly after death, her actual length was determined to be . Widely published data of specimens reported to have been several feet longer are not verified. At her death, a Burmese named "Baby" was the heaviest snake recorded in the world at the time at , much heavier than any wild snake ever measured. Her length was measured at circa 1999. The minimum size for adults is . Dwarf forms occur in Java, Bali, and Sulawesi, with an average length of in Bali, and a maximum of on Sulawesi. Wild individuals average long, but have been known to reach . Diseases In both their native and invasive range they suffer from Raillietiella orientalis (a pentastome parasitic disease). Distribution and habitat The Burmese python occurs throughout Southern and Southeast Asia, including eastern India, southeastern Nepal, western Bhutan, southeastern Bangladesh, Myanmar, Thailand, Laos, Cambodia, Vietnam, northern continental Malaysia, and southern China in Fujian, Jiangxi, Guangdong, Hainan, Guangxi, and Yunnan. It also occurs in Hong Kong, and in Indonesia on Java, southern Sulawesi, Bali, and Sumbawa. It has also been reported in Kinmen. It is an excellent swimmer and needs a permanent