Puerto Rican Boa

From Wikipedia, the free encyclopedia

Puerto Rican Boa

Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Squamata
Family:	Boidae
Subfamily:	Boinae
Genus:	Epicrates
Species:	E. inornatus

Binomial name

Epicrates inornatus
(Reinhardt, 1843)

The Puerto Rican Boa is a slender, terrestrial, viviparous boa with a dark brown coloration. It grows up to be about six to nine feet long. It feeds on small mammals, birds and lizards. As a member of the rainbow boas (genus Epicrates), it belongs to the family of the true boas (Boidae). It is currently on the endangered species list.

[edit] Distribution

The Puerto Rican Boa is endemic to the island of Puerto Rico. It is more common on the karst region in the north-western tip of the island. The boa feeds by seizing the prey in its jaws, wrapping several coils around the victim, and then constricting until the prey has suffocated. The prey is then swallowed head first. The feeding habits of the very young are unknown.

Pregnant females give birth to about twenty-three to twenty-six live young boas. Young boas have never been kept in captivity because their feeding patterns have never been studied.

Since the karst region in which the Puerto Rican Boa lives usually has many caves, the Boa has the opportunity to feed on bats. It was previously unknown how the boa managed to capture the bats on flight. Observations revealed that boas hang at the opening of the cave, waiting until bats fly out of it. Then they grab a bat with their jaws before killing it via constriction. The Puerto Rican Boa is the only known boa that captures bats in mid-flight.

[edit] Current status

Historic records, some dating back to the 1700s, indicate that during the first few centuries of Spanish colonization in Puerto Rico the boa was relatively abundant, and oil produced from the snake's fat was utilized extensively as an export. Impacts to the boa resulting from the oil trade were undoubtedly heightened by a concurrent reduction of habitat. Deforestation of the island began during this period and continued until, by the early 1900s, very little natural forest remained. When an expedition from the U.S. Natural Museum visited Puerto Rico in 1900, the boa had become so rare that no specimens could be collected. Predation by the mongoose, introduced into Puerto Rico in the 1900s, has been postulated as a further cause for the boa's present status, but there is no direct evidence to support this idea. There is an indication that the boa has recovered somewhat in recent years, although not to the degree that protective measures can be dropped. Some illegal hunting is apparently occurring at present for the snake's oil, which is used locally for medicinal purposes.