Largest serpent species in the world
| Rank | Common name | Scientific name | Family | Mass | Image | Length | Range map |
|---|---|---|---|---|---|---|---|
| 1 | Green anaconda (a.k.a. giant anaconda) | Eunectes murinus | Boidae | May exceed 227 kg (500 lb),measurement validity questionable 170 kg (370 lb), unverified but plausible weight for wild-caught specimen in Acre, Brazil, see section on remarkable individual specimens
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May exceed 8.8 m (28 ft 10 in), not firmly verified 6.32 m (20 ft 9 in), reliable for specimen listed by Rivas et al. 6.27 m (20 ft 7 in), somewhat reliable 5.6 m (18 ft 4 in), somewhat reliable 5.21 m (17 ft 1 in), reliable, maximum among 780 specimens caught over a seven-year period 1992–98 Average 3.7 m (12 ft 2 in) among 45 specimens (1992–98) Minimum adult length 3.2 m (10 ft 6 in) Some specimens may be of a distinct "northern green anaconda" species. |
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| 2 | Burmese python | Python bivittatus (now recognized as distinct from P. molurus) |
Pythonidae | 182.8 kg (403 lb), reliable, for "Baby" in 1998 (in captivity) 98 kg (216 lb), reliable, for the heaviest specimen found in the wild> 94 kg (207 lb), reliable, for the biggest male in the wild |
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5.7912 m (19 ft 0 in), reliable, for the longest specimen found in the wild July 10, 2023 Minimum adult length 2.35 m (7 ft 9 in) |
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| 3 | Reticulated python | Malayopython reticulatus | Pythonidae | Up to 158 kg (350 lb), somewhat reliable 158.8 kg (350 lb), somewhat reliable, for "Medusa" in 2011 About 156 kg (344 lb), somewhat reliable, for "Twinkie" in 2014 136 kg (300 lb), somewhat reliable, for "Fluffy" in 2010 133.7 kg (295 lb), reasonably reliable, for "Colossus" in 1954 (with an empty stomach) 124.7 kg (275 lb), somewhat reliable, for "Samantha" in 2002 115 kg (254 lb), somewhat reliable, for "Super Snake" in 2021 59 kg (130 lb), reliable, wild specimen in 1999 (after not eating for nearly 3 months) |
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10.05 m (33 ft 0 in), not firmly verified 7.92 m (26 ft 0 in), somewhat reliable, for "Samantha" in 2002 7.67 m (25 ft 2 in), somewhat reliable, for "Medusa" in 2011 7.3 m (23 ft 11 in), somewhat reliable, for "Fluffy" in 2010 7 m (23 ft 0 in), somewhat reliable, for "Twinkie" in 2014 7 m (23 ft 0 in), somewhat reliable, for "Super Snake" in 2021 6.95 m (22 ft 10 in), reliable, wild specimen in 1999 6.35 m (20 ft 10 in), reasonably reliable, for "Colossus" in 1963 (skeletal length) Specimens longer than 6 m (19 ft 8 in) are rare Minimum adult length 3.04 m (10 ft 0 in) Generally considered the world's longest |
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| 4 | Central African rock python | Python sebae (now recognized as distinct from P. natalensis) |
Pythonidae | Up to 113 kg (250 lb), not firmly verified 91 kg (200 lb), reliable |
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Up to 7.5 m (24 ft 7 in), not firmly verified 6.5 m (21 ft 4 in), reliable Minimum adult length 2.50 m (8 ft 2 in) |
 Range shown as green region |
| 5 | Southern African rock python | Python natalensis (now recognized as distinct from P. sebae) |
Pythonidae | 80 kg (180 lb), somewhat reliable, for the largest specimen 65 kg (143 lb), reliable Of 75 specimens measured in South Africa, the longest female weighed 53.4 kg (118 lb). |
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6 m (19 ft 8 in) not firmly verified 5.8 m (19 ft 0 in), reliable Of 75 specimens measured in South Africa, the longest female was 4.34 m (14 ft 3 in) long. Specimens longer than 4.6 m (15 ft 1 in) are rare. Typically 2.8–4 m (9 ft 2 in – 13 ft 1 in) |
Range shown as orange region |
| 6 | Indian python | Python molurus (now recognized as distinct from P. bivittatus) |
Pythonidae | 91 kg (200 lb), not firmly verified 52 kg (115 lb), reliable |
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6.4 m (21 ft 0 in), not firmly verified 4.6 m (15.1 ft), reliable |
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| 7 | Australian scrub python | Simalia kinghorni (now recognized as distinct from S. amethistina) |
Pythonidae | 35 kg (77 lb), reliable 24 kg (53 lb), reliable |
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Some reports up to or exceeding 8 m (26 ft 3 in), not firmly verified 7.2 m (23 ft 7 in), not firmly verified In excess of 6 m (19 ft 8 in) 5.65 m (18 ft 6 in), reliable Typically 3.5 m (11 ft 6 in) Minimum adult length 1.8 m (5 ft 11 in) Little information about size is available |
 Range shown as dark green region |
| 8 | Amethystine python | Simalia amethistina (recently recognized as distinct from S. kinghorni) |
Pythonidae | Able to reach 20 kg (44 lb), and probably larger Little information about size is available |
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Able to reach 5.5 m (18 ft 1 in) 4.72 m (15 ft 6 in), reliable Little information about size is available |
Range shown as dark orange and bright orange regions |
| 9 | Yellow anaconda | Eunectes notaeus | Boidae | They commonly weigh 25–35 kg (55–77 lb), though large specimens can weigh 40–55 kg (88–121 lb) or even more. |  |
4.6 m (15.1 ft), reasonably reliable Typically 3–4 m (9 ft 10 in – 13 ft 1 in) 3.1 m (10 ft 2 in) maximum among 86 specimens in a field study |
South America |
| 10 | Red tailed boa | Boa constrictor | Boidae | More than 45 kg (99 lb) | .jpg) |
Possibly up to 4.3 m (14 ft 1 in) A much larger report was debunked |
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| 11 | Cuban boa | Chilabothrus angulifer | Boidae | Maximum 40 kg (88 lb), reliable 27 kg (60 lb), reliable |
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5.65 m (18 ft 6 in), for the largest specimen Up to 4.8 m (15 ft 9 in) |
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| 12 | Beni anaconda | Eunectes beniensis (now recognized as distinct from E. murinus and E. notaeus) |
Boidae | 35 kg (77 lb) |  |
Largest specimen 3.2 m (10 ft 6 in), relatively reliable Typically up to 2 m (6 ft 7 in), relatively reliable Little information about size is available (known from only six specimens as of 2009) |
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| 13 | Dark-spotted anaconda | Eunectes deschauenseei (sometimes confused with E. notaeus) |
Boidae | 30 kg (66 lb) |  |
3 m (9 ft 10 in), relatively reliable | 
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| 14 | Papuan python | Apodora papuana | Pythonidae | Average reported as 22.5 kg (50 lb) Little information about size is available |
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One reasonably reliable report of 4.39 m (14 ft 4.8 in) Average reported as 4 m (13 ft 1.5 in) Often reaches 3–4 m (9 ft 10.1 in – 13 ft 1.5 in) Most specimens 1.4–3.6 m (4 ft 7 in – 11 ft 10 in) Little information about size is available |
Ref; List of largest snakes
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