Anacondas or water boas are a group of large snakes of the genus Eunectes. They are found in tropical South America. Four species are currently recognized.

Temporal range: Miocene-recent[1]
Green anaconda, Eunectes murinus
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Suborder: Serpentes
Family: Boidae
Subfamily: Boinae
Genus: Eunectes
Anaconda Range.jpg
Range of Eunectes
  • Boa Linnaeus, 1758


Although the name applies to a group of snakes, it is often used to refer only to one species, in particular, the common or green anaconda (Eunectes murinus), which is the largest snake in the world by weight, and the second longest.


The South American names anacauchoa and anacaona were suggested in an account by Peter Martyr d'Anghiera, but the idea of a South American origin was questioned by Henry Walter Bates who, in his travels in South America, failed to find any similar name in use. The word anaconda is derived from the name of a snake from Ceylon (Sri Lanka) that John Ray described in Latin in his Synopsis Methodica Animalium (1693) as serpens indicus bubalinus anacandaia zeylonibus, ides bubalorum aliorumque jumentorum membra conterens.[2] Ray used a catalogue of snakes from the Leyden museum supplied by Dr. Tancred Robinson, but the description of its habit was based on Andreas Cleyer who in 1684 described a gigantic snake that crushed large animals by coiling around their bodies and crushing their bones.[3] Henry Yule in his Hobson-Jobson notes that the word became more popular due to a piece of fiction published in 1768 in the Scots Magazine by a certain R. Edwin. Edwin described a 'tiger' being crushed to death by an anaconda, when there actually never were any tigers in Sri Lanka.[a] Yule and Frank Wall noted that the snake was in fact a python and suggested a Tamil origin anai-kondra meaning elephant killer.[5] A Sinhalese origin was also suggested by Donald Ferguson who pointed out that the word Henakandaya (hena lightning/large and kanda stem/trunk) was used in Sri Lanka for the small whip snake (Ahaetulla pulverulenta)[6] and somehow got misapplied to the python before myths were created.[7][8][9]

The name commonly used for the anaconda in Brazil is sucuri, sucuriju or sucuriuba.[10]

Skeleton at the Redpath Museum
14-foot anaconda skeleton (center) on display at the Museum of Osteology alongside other species for comparison.

Species and other uses of the term "anaconda"

The term "anaconda" has been used to refer to:

Eunectes murinus in Colombia
  • Any member of the genus Eunectes, a group of large, aquatic snakes found in South America:
    • Eunectes murinus, the green anaconda – the largest species, found east of the Andes in Colombia, Venezuela, the Guianas, Ecuador, Peru, Bolivia, Brazil and Trinidad and Tobago
    • Eunectes notaeus, the yellow anaconda – a small species, found in eastern Bolivia, southern Brazil, Paraguay, and northeastern Argentina
    • Eunectes deschauenseei, the darkly-spotted anaconda – a rare species, found in northeastern Brazil and coastal French Guiana
    • Eunectes beniensis, the Bolivian anaconda – the most recently defined species, found in the Departments of Beni and Pando in Bolivia
    • The term was previously applied imprecisely, indicating any large snake that constricts its prey,[11] though this usage is now archaic.
    • "Anaconda" is also used as a metaphor for an action aimed at constricting and suffocating an opponent - for example, the Anaconda Plan proposed at the beginning of the American Civil War, in which the Union Army was to effectively "suffocate" the Confederacy.

See also


  1. ^ In South Asian languages like Hindi, the leopard and tiger may share the same name, that is Bágh (Hindi: बाघ), and it is the former that occurs in Sri Lanka.[4]


  1. ^ Hsiou, Annie S.; Albino, Adriana M. (2009). "Presence of the Genus Eunectes (Serpentes, Boidae) in the Neogene of Southwestern Amazonia, Brazil". Journal of Herpetology. 43 (4): 612. doi:10.1670/08-295.1.
  2. ^ Ray, John (1693). Synopsis methodica animalium quadrupedum et serpentini generis. London: Impensis S. Smith & B. Walford. p. 332.
  3. ^ Owen, Charles (1742). An essay towards a natural history of serpents. p. 114.
  4. ^ Pocock, R. I. (1930). "The Panthers and Ounces of Asia". Journal of the Bombay Natural History Society. 34 (2): 197–336.
  5. ^ Wall, Frank (1921). Ophidia Taprobanica or the Snakes of Ceylon. Ceylon: Government Press. p. 48.
  6. ^ Willey, A (1904). "Some rare snakes of Ceylon". Spolia Zeylanica. 1: 81–89.
  7. ^ Ferguson, Donald (1897). "The derivation of "Anaconda"". Notes and Queries. 12 (294): 123–124. doi:10.1093/nq/s8-XII.294.123.
  8. ^ Skeat, Walter W. (1882). A concise etymological dictionary of the English Language. Oxford University Press. p. 16.
  9. ^ Yule, Henry; Burnell, A.C. (1903). Hobson-Jobson. London: John Murray. pp. 24–25.
  10. ^ "Dicionário online de português: sucuriju". Retrieved 19 February 2014.
  11. ^ Oxford. 1991. The Compact Oxford English Dictionary. Second Edition. Clarendon Press, Oxford. ISBN 0-19-861258-3.

Further reading

  • Ray J. 1693. Synopsis methodica animalium quadrupedum et serpentini generis. Vulgarium natas characteristicas, rariorum descriptiones integras exhibens: cum historiis & observationibus anatomicis perquam curiosis. Præmittuntur nonnulla de animalium in genere, sensu, generatione, divisione, &c. - pp. [1-14], 1–336, [1-9]. Londini. (Smith & Walford).
  • Yule H, Burnell AC. 1886. Hobson-Jobson: A Glossary of Colloquial Anglo-Indian Words and Phrases, and of Kindred terms, Etymological, Historical, Geographical, and Discursive. London: J. Murray. pp. 133–134. (reprinted in 1903 by W. Crooke).