List of largest snakes

The largest living snakes in the world, measured either by length or by weight, are various members of the boidae and pythonidae families. They include anacondas, pythons, and boa constrictors, which are all non-venomous constrictors. The longest venomous snake, with a length up to 18.5–18.8 ft (5.6–5.7 m), is the king cobra,[1] and the heaviest venomous snake is likely to be the Gaboon viper (which also has the longest fangs and delivers the largest amount of venom) or possibly the Eastern diamondback rattlesnake – all three of which reach maximum weights in the range of 6–20 kilograms (13–44 lb).

There are ten living snakes, listed below according to their maximum known or reported mass, that have a maximum mass that may reach or exceed 50 pounds (23 kg). Pending the acceptance of its taxonomic status, the Bolivian python (Eunectes beniensis) may also merit inclusion, and the northern and southern variations of African rock python could be considered separately.

In terms of length, in addition to those listed here, there are two other species that may possibly reach a length of 20 feet (6.1 m) or more – the Oenpelli python (Morelia oenpelliensis) and the olive python (Liasis olivaceus) – however, the information available about those species is rather limited.[2] The Oenpelli python, in particular, has been called the rarest python in the world, and there is only one known specimen legally held in captivity.[3][4][5]

It is important to be aware that there is considerable variation in the maximum reported size of these species, and most measurements are not truly verifiable, so the sizes listed should not be considered definitive. In general, the reported lengths are likely to be somewhat overestimated.[6] In spite of what has been, for many years, a standing offer of a large financial reward (initially $1,000 offered by U.S. President Theodore Roosevelt in the early 1900s,[7] later raised to $5,000, then $15,000 in 1978 and $50,000 in 1980) for a live, healthy snake over 30 ft (9.1 m) long by the New York Zoological Society (later renamed as the Wildlife Conservation Society), no attempt to claim the reward has ever been made.[2]

Although it is generally accepted that the reticulated python is the world's longest living snake, most length estimates longer than 6.35 m (20 ft 10 in) have been called into question.[6] It has been suggested that confident length records for the largest snakes must be established from a dead body soon after death, or alternatively from a heavily sedated snake, using a steel tape and in the presence of witnesses, and must be published (and preferably recorded on video).[6] At least one reticulated python was measured under full anesthesia at 6.95 m (22 ft 10 in), and somewhat less reliable scientific reports up to 10 m (33 ft) have appeared.[8]

Rank Common name Scientific name Family Mass Image Length Native range by continent(s)
1 Green anacondaEunectes murinusBoidaeMay exceed 227 kg (500 lb),[9] validity questionable
97.5 kg (215 lb) maximum among 780 specimens caught over a seven-year period 1992–1998[10]
Average 30.8 kg (68 lb) among 45 specimens (1992–1998)[10]
Generally considered the heaviest		May exceed 8.8 m (29 ft),[9] not firmly verified[6]
5.21 m (17.1 ft) maximum among 780 specimens caught over a seven-year period 1992–1998[10]
Average 3.7 m (12 ft) among 45 specimens (1992–1998)[10]
Minimum adult length 3.2 m (10 ft)[2]
Generally considered the second longest		South America
2 Burmese pythonPython bivittatusPythonidae182.8 kg (403 lb), reliable, for "Baby" in 1998[6]5.74 m (18.8 ft), reliable, for "Baby" ca. 1999[6]
Minimum adult length 2.35 m (7.7 ft)[2]		Asia
3 Reticulated pythonPython reticulatusPythonidaeUp to 158 kg (350 lb)[11]
158.8 kg (350 lb), somewhat reliable, for "Medusa" in 2011[12]
136 kg (300 lb), more reliable, for "Fluffy" in 2010[13]
133.7 kg (295 lb), reasonably reliable, for "Colossus" in 1954 (with an empty stomach)[6][14]
124.7 kg (275 lb), reasonably reliable, for "Samantha" in 2002[14][15]
59 kg (130 lb), reliable, wild specimen in 1999 (after not eating for nearly 3 months)[8]		10 m (33 ft),[11] not firmly verified[6]
7.9 m (26 ft), reasonably reliable, for "Samantha" in 2002[14][15]
7.67 m (25.2 ft), somewhat reliable, for "Medusa" in 2011[12]
7.3 m (24 ft), reasonably reliable, for "Fluffy" in 2010[13]
6.95 m (22.8 ft), reliable, wild specimen in 1999[8]
6.35 m (20.8 ft), reasonably reliable, for "Colossus" in 1963 (skeletal length)[6]
Minimum adult length 3.04 m (10.0 ft)[2]
Generally considered the world's longest		Asia
4 African rock pythonPython sebae
(sometimes considered two species, P. sebae and P. natalensis)		PythonidaeUp to 113 kg (250 lb)[16]Up to 7.5 m (25 ft),[17] not firmly verified[6]
Minimum adult length 2.50 m (8.2 ft)[2]		Africa
5 Indian pythonPython molurusPythonidae91 kg (200 lb)[18]6.4 m (21 ft),[18] not firmly verified[6]Asia
6 Amethystine (scrub) pythonMorelia amethistinaPythonidae90 kg (200 lb)
Little information about size is available[2][19]		Some reports up to[20] or exceeding 8 m (26 ft),[2] not firmly verified[6]
In excess of 6 m (20 ft)[20]
Typically 3.5 m (11 ft)[2]
Minimum adult length 1.8 m (5.9 ft)[2]
Little information about size is available[2][19]		Asia, Australia
7 Boa constrictorBoa constrictorBoidaeMore than 45 kg (99 lb)[21]Possibly up to 4 m (13 ft)[21]
A much larger report was debunked[6][22]		North America, South America
8 Yellow anacondaEunectes notaeusBoidae40 kg (88 lb)[23]
Typically 30 kg (66 lb)[23]		4.6 m (15 ft)[23]
Typically 3–4 m (10–13 ft)[23]
3.1 m (10 ft) maximum among 86 specimens in a field study[24]		South America
9 Dark-spotted anacondaEunectes deschauenseeiBoidae30 kg (66 lb)3 m (9.8 ft),[25] validity unknownSouth America
10 Papuan pythonApodora papuanaPythonidae22.5 kg (50 lb)[26]
Little information about size is available[2]		One reasonably reliable report of 4.4 m (14.4 ft)[2][27]
Often reaches 3–4 m (9.8–13.1 ft)[2]
Most specimens 1.4–3.6 m (4.6–11.8 ft)[27]
Little information about size is available[2]		Asia, Australia (Oceania)

See also

Wikispecies has information related to: Reptilia

References

  1. ↑ Mehrtens, John (1987). Living Snakes of the World. New York: Sterling. ISBN 0-8069-6461-8.
  2. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Murphy, J. C.; Henderson, R. W. (1997). Tales of Giant Snakes: A Historical Natural History of Anacondas and Pythons. Krieger Pub. Co. pp. 2, 19, 37, 42, 55–56. ISBN 0-89464-995-7.
  3. ↑ Rarest Python in the World. SnakeBytesTV. December 18, 2013. Retrieved 2016-02-04.
  4. ↑ Breeding plan aims to save snakes. ABC News (Australia). March 29, 2012. Retrieved 2016-02-04.
  5. ↑ Smith, Deborah (June 20, 2012). "Snakes alive – if only he'd been seeing double". Sydney Morning Herald. Retrieved 2016-02-09.
  6. 1 2 3 4 5 6 7 8 9 10 11 12 13 Barker, David G.; Barten, Stephen L.; Ehrsam, Jonas P.; Daddono, Louis (2012). "The Corrected Lengths of Two Well-known Giant Pythons and the Establishment of a new Maximum Length Record for Burmese Pythons, Python bivittatus" (PDF). Bull. Chicago Herp. Soc. 47 (1): 1–6. Retrieved 2016-02-04.
  7. ↑ Gordon, David George, "The Search for the $50,000 Snake". MSN Encarta. Archived October 31, 2009.
  8. 1 2 3 Fredriksson, G. M. (2005). "Predation on Sun Bears by Reticulated Python in East Kalimantan, Indonesian Borneo". Raffles Bulletin of Zoology 53 (1): 165–168. Retrieved 2016-02-04.
  9. 1 2 "Green anacondas: Eunectes murinus". National Geographic. Retrieved 2016-02-04.
  10. 1 2 3 4 Rivas, Jesús Antonio (2000). The life history of the green anaconda (Eunectes murinus), with emphasis on its reproductive Biology (PDF) (Ph.D. thesis). University of Tennessee. pp. 7, 36 (esp. Table 3–1), 74–80 (esp. Table 5–1), 111. Retrieved 2016-02-04.
  11. 1 2 Mexico, Todd (2000). "Python reticulatus". Animal Diversity Web. Retrieved 2016-02-03.
  12. 1 2 "Longest snake – ever (captivity)". Guinness Book of World Records. October 12, 2011. Retrieved 2016-02-04.
  13. 1 2 "R.I.P. Fluffy: Guinness record-holding reticulated python, 24 feet long, dies at Columbus Zoo". The Los Angeles Times. Associated Press. October 27, 2010. Retrieved 2016-02-04.
  14. 1 2 3 "The Reticulated Python, Malayopython, Clade". Giant Constricting Snakes: The Science of Large Serpents, JCM Natural History. Retrieved 2016-02-04.
  15. 1 2 Santora, Marc (November 22, 2002). "Never Leather, Samantha The Python Dies at the Zoo". The New York Times. Retrieved 2016-02-04.
  16. ↑ "African rock python". Oregon Zoo. Retrieved 2016-02-04.
  17. ↑ "African rock python (Python sebae)". Wildscreen. Retrieved 2016-02-04.
  18. 1 2 "Python molurus: Indian Python". Animal Diversity Web. Retrieved 2016-02-04.
  19. 1 2 "Amethystine Python, Simalia amethistina (Schneider)". Giant Constricting Snakes: The Science of Large Serpents, JCM Natural History. Retrieved 2016-02-04.
  20. 1 2 Obst, Fritz Jürgen; Richter, Klaus; Jacob, Udo (1988). The Completely Illustrated Atlas of Reptiles and Amphibians for the Terrarium (originally published in German in 1984 as Lexicon der Terraristik und Herpetologie by Edition Leipzig). T.F.H. Publications. pp. 496–498. ISBN 978-0-86622-958-6.
  21. 1 2 "Boa Constrictor: Boa constrictor". National Geographic. Retrieved 2016-02-04.
  22. ↑ "The Boa Clade". Giant Constricting Snakes: The Science of Large Serpents, JCM Natural History. Retrieved 2016-02-04.
  23. 1 2 3 4 Colthorpe, Kelly (2009). "Eunectes notaeus". Animal Diversity Web. Retrieved 2016-02-03.
  24. ↑ "Yellow Anaconda, Eunectes notaeus (Cope)". Giant Constricting Snakes: The Science of Large Serpents, JCM Natural History. Retrieved 2016-02-04.
  25. ↑ "De Schauensee's Anaconda, Eunectes deschauenseei (Dunn and Conant)". Giant Constricting Snakes: The Science of Large Serpents, JCM Natural History. Retrieved 2016-02-04.
  26. ↑ de Groot, Michael (2015). "Apodora Papuana: Papuan Olive Python". Pythonidae. Retrieved 2016-02-09.
  27. 1 2 "Papuan Olive Python, Simalia papuana (Peters and Doria, 1878)". Giant Constricting Snakes: The Science of Large Serpents, JCM Natural History. Retrieved 2016-02-04.
Wikispecies has information related to: Reptilia
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