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Burmese python
The Burmese python (''Python bivittatus'') is one of the five largest species of snakes in the world (about the third-largest as measured either by length or weight). It is native to a large variation of tropic and subtropic areas of South and Southeast Asia. Until 2009, it was considered a subspecies of ''Python molurus'', but now is recognized as belonging to a distinct species.
They are often found near water and are sometimes semi-aquatic, but can also be found in trees. Wild individuals average long,〔M. A. Smith: ''Reptilia and Amphibia, Vol. III, Serpentes''. In: ''The Fauna of British India, Ceylon and Burma, including the whole of the Indo-Chinese Sub-Region''. Taylor and Francis, Ltd., London 1943, p 102-109〕〔S. M. Campden-Main: ''A field guide to the snakes of South Vietnam''. City of Washington 1970, p 8-9.〕 but have been known to reach .〔D. G. Barker, S. L. Barten, J. P. Ehrsam, L. Daddono: ''The Corrected Lengths of Two Well-known Giant Pythons and the Establishment of a New Maximum Length Record for Burmese Pythons, Python bivittatus''. Bulletin of the Chicago Herpetological Society 47(1): 1-6, 2012, (pdf ).〕
==Description==
Burmese pythons are dark-colored snakes with many brown blotches bordered in black down the back. The perceived attractiveness of their skin pattern contributes to their popularity with both reptile keepers and the leather industry. The pattern is similar in colour, but different in actual pattern from the African rock python (''Python sebae''), sometimes resulting in confusion of the two species outside of their natural habitats. The African rock python can generally be distinguished by its tighter pattern of markings, compared to the Burmese python, which has bolder patterns, similar to those seen on a giraffe.〔Comparing Wild Florida Burmese & African Rock Pythons - http://www.youtube.com/watch?v=MosOA408Ye8〕
In the wild, Burmese pythons grow to on average,〔〔 while specimens of more than are uncommon.〔H. Saint Girons: ''Les serpents du Cambodge''. Mémoires du Muséum national d'Histoire naturelle, Série A 1972, p. 40-41.〕〔J. Deuve: ''Serpents du Laos''. Mémoire O.R.S.T.O.M. Nr. 39, Paris 1970, p. 61-62, 65-66.〕 This species is sexually dimorphic in size; females average only slightly longer, but are considerably heavier and bulkier than the males. For examples, 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 .〔Van Mierop, L. H. S., & Barnard, S. M. (1976). ''Observations on the reproduction of Python molurus bivittatus (Reptilia, Serpentes, Boidae)''. Journal of Herpetology, 333-340.〕〔Barker, D. G., Murphy, J. B., & Smith, K. W. (1979). ''Social behavior in a captive group of Indian pythons, Python molurus (Serpentes, Boidae) with formation of a linear social hierarchy''. Copeia, 466-471.〕〔Marcellini, D. L., & Peters, A. (1982). ''Preliminary observations on endogeneous heat production after feeding in Python molurus''. Journal of Herpetology, 92-95.〕〔Jacobson, E. R., Homer, B., & Adams, W. (1991). ''Endocarditis and congestive heart failure in a Burmese python (Python molurus bivittatus)''. Journal of Zoo and Wildlife Medicine, 245-248.〕〔Groot, T. V. M., Bruins, E., & Breeuwer, J. A. J. (2003). ''Molecular genetic evidence for parthenogenesis in the Burmese python, Python molurus bivittatus''. Heredity, 90(2), 130-135.〕 In general, individuals over are rare.〔 The record maximum length for Burmese pythons is held by a female named “Baby”, that lived at Serpent Safari, Gurnee, Illinois, for 27 years. Shortly after death, her actual length was determined to be . Widely published data of specimens that were reported to have been even several feet longer are not verified.〔 Dwarf forms occur on Java, Bali, and Sulawesi. On Bali, they reach an average length of ,〔J. L. McKay: ''A field guide to the amphibians and reptiles of Bali''. Krieger Publishing Company 2006, ISBN 1-57524-190-0, p. 13, 14, 18, 86.〕 and on Sulawesi, they achieve a maximum of .〔R. de Lang, G. Vogel: ''The snakes of Sulawesi: A field guide to the land snakes of Sulawesi with identification keys''. Frankfurt Contributions to Natural History Band 25, Edition Chimaira 2005, ISBN 3-930612-85-2, S. 23-27, 198-201.〕
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