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Friday, August 12, 2011

Boa Constricto



Beauty Of Animal | Boa Constricto | The Boa constrictor (Boa constrictor) is a large, heavy-bodied species of snake. It is a member of the family Boidae found in North, Central, and South America, as well as some islands in the Caribbean. A staple of private collections and public displays, its color pattern is highly variable yet distinctive. Ten subspecies are currently recognized, although some of these are controversial. This article focuses on the species Boa constrictor as a whole, but also specifically on the nominate subspecies Boa constrictor constrictor.Though all boids are constrictors, only this species is properly referred to as "Boa constrictor"; an almost unique instance of an animal having the same common and scientific binomial name. (The distinction is shared with Tyrannosaurus rex.)All subspecies are referred to as "Boa constrictors", while the nominate subspecies, B. c. constrictor, is often referred to specifically as the "red-tailed boa".


Within the exotic pet trade it is also known as a "BCC", an abbreviation of its scientific name, to distinguish it from other Boa constrictor subspecies such as the Boa constrictor imperator which is also regularly, and erroneously, referred to as a "red-tailed boa".Other common names include "jib√≥ia" (Latin American) and "macajuel" (Trinidadian, pronounced mah-cah-well).The Boa constrictor is a large snake, although only modestly sized in comparison to other large snakes such as the reticulated and Burmese python, and can reach lengths of anywhere from 1–4 meters (3–13 feet) depending on the locality and the availability of suitable prey. There is clear sexual dimorphism seen in the species, with females generally being significantly larger in both length and girth than males. As such, the average size of a mature female boa is between 7–10 ft, whilst it is only 6–8 ft for the males. It is common for female individuals to exceed 10 ft, particularly in captivity, where lengths of up to 12 ft or even 14 ft can be seen.


A report of a Boa constrictor growing up to 18½ ft (5.5 m) was later found to be a misidentified green anaconda.[The Boa constrictor is a heavy-bodied snake, and large specimens can weigh up to 27 kg (60Ibs).The size and weight of a Boa constrictor depends on subspecies, locale and the availability of suitable prey. Several populations of Boa constrictors are known as "dwarf boas", such as the population of B. c. imperator on Hog Island. These smaller subspecies are generally insular populations. B. c. constrictor itself reaches, and occasionally tops, the averages given above, as it is one of the relatively large subspecies of Boa constrictor.Other examples of sexual dimorphism in the species include the fact that males generally have longer tails to contain the hemipenes and also longer pelvic spurs, which are used to grip and stimulate the female during copulation.Pelvic spurs are the only external sign of the rudimentary hind legs and pelvis, seen in all boas and pythons.


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