Tag Archive: constrictors


TAXONOMY
Kingdom: Animalia
Phylum: Chordata
Subphylum: Vertebrata
Class: Reptilia
Order: Squamata
Suborder: Serpentes
Family: Boidae

Genus/species: Boa constrictor constrictor

Red-tailed Boa IMG_0186

GENERAL CHARACTERISTICS: The background color is cream or brown that is marked with dark “saddle-shaped” bands. The head of a boa constrictor has 3 distinctive stripes. First is a line that runs dorsally from the snout to the back of the head. Second, there is a dark triangle between the snout and the eye. Third, this dark triangle is continued behind the eye, where it slants downward towards the jaw. However, there are many variations on appearance.
Length to 13 feet (3.9 m) as adults. Generally between 2 and 3 meters(6.5 – 10 feet) in length. Weigh 40 to 50 pounds.

DISTRIBUTION/HABITAT: Exclusive to the New World (Mexico to Argentina). Boa constrictors are both terrestrial and arboreal. They are found in deserts, wet tropical forests, open savanna, and cultivated fields, and from sea level to moderate elevation having the least need for water of all boas.

DIET IN THE WILD: They ate aglyphous, meaning they do not possess any elongated fangs. Instead, they have rows of long, recurved teeth of about the same size. Teeth are continuously replaced. They are carnivores eating small mammals, including bats, and birds or anything that fits in their mouths. Prey are killed by constriction and swollen whole taking 4-6 days to digest.

REPRODUCTION: Fertilization is internal. The male uses pelvic spurs (hind leg remnants found on either side of the cloacal opening) to aid the use of hemipenes (double penis) for cloacal insertion. Females give birth to live young (ave. 25 in number).

Red-tailed Boa 2775385563_c91e7827ff_o

MORTALITY: Lifespan, 25-30 years.

PREDATORS  Include humans, jaguars, and crocodile 

CONSERVATION : IUCN Red list; not evaluated.

REMARKS: In Mexico and South America, they are valued as destroyers of rodents. B. constrictor constrictor have been “domesticated” for this reason.

Color of Life Note: The Red-Tailed Boa demonstrates concealment with its beige and dark brown markings hiding it in the filtered light coming through tree branches and leaves.

References

California Academy of Sciences Flooded Amazon Exhibit 2015

Ron’s WordPress Shortlink  http://wp.me/p1DZ4b-VA

Ron’s flickr  http://www.flickr.com/photos/cas_docents/sets/72157608449603666/

U. of Michigan Animal Diversity Web animaldiversity.ummz.umich.edu/ site/ accounts/ information/ Boa_constrictor.html.

Smithsonian National Zoological Park  http://nationalzoo.si.edu/Animals/ReptilesAmphibians/Facts/FactSheets/Boaconstrictor.cfm

TAXONOMY
Kingdom: Animalia
Phylum: Chordata
Subphylum: Vertebrata
Class: Reptilia
Order: Squamata
Suborder: Serpentes
Family: Boidae
Subfamily: Boinae

Genus/species: Epicrates cenchria

GENERAL CHARACTERISTICS: The Brazilian rainbow boa is one of about 12 named subspecies of rainbow boa. Color is brown or reddish brown with three parallel black stripes on the top of the head and large black rings down the back that give the appearance of dorsal blotches. There is a great deal of variation in color and marking among individuals of this species. Length is four to six feet (1.2 to 1.8 m).

Brazilian Rainbow Boa15580871426_15f0f85863_k

 

DISTRIBUTION/HABITAT: Found in the Amazon Basin, and in coastal Guiana, French Guyana, and Suriname and southern Venezuela most often in humid forests.

DIET IN THE WILD: Rodents, birds, and possibly some forms of aquatic life and lizards.

REPRODUCTION: Babies are born live in litters of two to 35 (viviparous). They are usually 15 to 20 inches (38 to 51 cm) long.

LIFESPAN: To 20 years in capativity.

REMARKS: E. cenchria is named because of the iridescent sheen imparted by microscopic ridges on their scales, which act like prisms to refract light into rainbows.

Brazilian Rainbow Boa15580871146_3fc18628e1_k

 

References

 National Zoo http://nationalzoo.si.edu/Animals/ReptilesAmphibians/Facts/FactSheets/Brazilianrainbowboa.cfm

The Reptile Database  http://reptile-database.reptarium.cz/species?genus=Epicrates&species=cenchria

Ron’s WordPress shortlink  http://wp.me/p1DZ4b-1nJ

Ron’s flickr  https://www.flickr.com/photos/cas_docents/15580871426/

%d bloggers like this: