Anaconda

For other uses, see Anaconda (disambiguation).

Anaconda
Yellow Anaconda, Eunectes notaeus
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Squamata
Suborder:	Serpentes
Family:	Boidae
Subfamily:	Boinae
Genus:	Eunectes Wagler, 1830
Species
E. beniensis E. deschauenseei E. murinus E. notaeus

Anacondas are four species of aquatic boa inhabiting the swamps and rivers of the dense forests of tropical South America. The Yellow Anaconda can be found as far south as northern Argentina.

Etymology

There are two possible origins for the word 'anaconda.' It is perhaps an alteration of the Sinhalese word henakandaya, meaning 'whip snake' (literally, 'giant body'), or alternatively, the Tamil word anaikondran, which means 'elephant killer'. It is unclear how the name originated so far from the snake's native habitat; it is likely due to its vague similarity to the large Asian pythons. Local names for the anaconda in South America include the Spanish term matatoro, meaning 'bull killer', and the Native American terms sucuri and yakumama. Anacondas as members of the boa family are sometimes called water boas. The Latin name for Anaconda is Eunectes (from the Greek "Eυνήκτης", meaning "good swimmer").

Size

See also: Giant anaconda

There is some debate about the maximum size of anacondas, and there have been unverified claims of enormous snakes alleged to be as long as 30–45 m (98.4–147.6 ft). According to Lee Krystek, a 1944 petroleum expedition in Colombia claimed to have measured an Template:M to ft specimen, but this claim is not regarded as reliable; perhaps a more credible report came from scientist Vincent Roth, who claimed to have shot and killed a Template:M to ft specimen. Based on documented evidence, Anacondas can grow to about 23 feet long.

There are some reports from early explorers of the South American jungles seeing giant anacondas up to Template:M to ft long, and some of the native peoples have reported seeing anacondas up to Template:M to ft long, but these reports remain unverified.

Another claim of an extraordinarily large anaconda was made by adventurer Percy Fawcett. During his 1906 expedition, Fawcett wrote that he had shot an anaconda that measured some Template:M to ft from nose to tail. Once published, Fawcett’s account was widely ridiculed. Decades later, Belgian zoologist Bernard Heuvelmans came to Fawcett's defence, arguing that Fawcett's writing was generally honest and reliable.

Historian Mike Dash wrote of claims of still larger anacondas, alleged to be as long as Template:M to ft to Template:M to ft — some of the sightings supported with photos (although those photos lack scale). Dash noted that if a 50–60 ft anaconda strains credulity, then a 150 ft long specimen is generally regarded as an outright impossibility.

Wildlife Conservation Society has, since the early 20th century, offered a large cash reward (currently worth US$50,000) for live delivery of any snake of 30 feet or more in length. The prize has never been claimed. Also, in a study of 1,000 wild anacondas in Brazil, the largest captured was 17 feet (5.2 m) long.

In November 2007, an anaconda measuring over Template:M to ft and weighing nearly Template:Kg to lb was captured in the backyard of an abandoned house in Paraná, Brazil.

In captivity

There have been very few instances of anacondas being bred in captivity. In October 2007, the New England Aquarium in Boston achieved a breakthrough when it was discovered that one of the aquarium's female anacondas was gravid. On January 1st, 2008, fourteen anaconda babies were born at the New England Aquarium. Anacondas, like other boas, give birth to live young.

Bibliography

• Bernard Heuvelmans (1958). On the Track of Unknown Animals. Hill and Wang. ISBN 0710304986.

External links

• Animal Diversity Web: Eunectes murinus (green anaconda)