Lifestyle and Lifespan
Boa constrictor has long been famous as one of the largest species of snake. In reality, boa constrictors are fairly modest-sized boids and are dwarfed by the other competitors for this title. 10-12 feet has been recorded, but this length is unusual. Red tailed boas may forage in the trees, but they are mainly terrestrial, especially the larger ones, and live in hollow logs, mammal burrows, etc.
This boa constrictor is typically tan with approximately 20 dark dorsal saddles running the length of the body. The tail blotches are usually red, orange or brown with black edging. Laterally there are tan, brown or black blotches (circular or diamond-shaped) spaced along the saddles. Undersides are yellowish, spotted with black.
Like most snakes, boa constrictors rely on strong vomeronasal senses. Their tongues flick continuously, bringing odor molecules into contact with the chemosensory (vomeronasal) organ in the top of their mouths. In this manner, they constantly sense chemical cues in their environment. As with other snakes, the boa's loosely hinged jaws can be stretched far apart, enabling it to swallow animals with bodies much larger in diameter than the boa's head. Boa constrictors have good vision, even into the ultraviolet spectrum. In addition, they can detect both vibrations in the ground and sound vibrations through the air through their jaw bones. Unlike most boids, boa constrictors lack thermosensory pits.
Boa constrictors occupy a variety of habitats. Primary habitat is rainforest clearings or edges. However, they are also found in woodlands, grasslands, dry tropical forest, thorn scrub, and semi-desert.
Consists of rodents, birds, iguanas, and monkeys.
They are important predators of rodents and opossums, especially, which can become pests in some areas and carry human diseases. Though there are few references to predation on boa constrictors in nature, they are certainly killed and consumed by numerous reptilian, avian, and mammalian predators. Young boas are especially vulnerable.
Boa constrictors are nocturnal or crepuscular, though they bask in the sun to warm themselves in cool weather.
Boa constrictors are solitary, associating with conspecifics only to mate. However, Dominican populations which will occasionally den together.
The female boa constrictor is ovoviviparous which means eggs hatch within her young emerge alive at birth. Most female boa constrictors do not appear to reproduce annually.
Known to give birth to as many as 64 at one time, but averaging about 30 offspring.
Some populations have been hit harder than others, and various wild populations are now endangered, particularly those on offshore islands.
Boa constrictors are popular in the pet trade. It is easy to obtain boa constrictors that have been captive bred for generations, increasing their affinity for humans.
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In certain parts of South America the Colombian red tail boa is kept as a house pet to kill rats.
In some areas boas constrictors can play a large role in controlling population of opossums which can be carriers for the human disease leishmaniasis, which is transferred by blood-feeding sand flies that parasitize the opossums.
If captive boa constrictors are presented with dead prey, they still constrict the food item before consuming it.