Boa constrictor | Description, Size, Subspecies, & Facts (2024)

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Also known as: Boa constrictor

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Related Topics:
Boa constrictor ortonii
Argentine boa constrictor
red-tailed boa

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boa constrictor, (Boa constrictor), large thick-bodied snake of the boa family, Boidae. Its range is wide, from Argentina to northern Mexico. Though it thrives in tropical rainforests, it also inhabits savannas, cane fields, and semiarid scrublands. The snake’s adult length is typically about 10 feet (3 metres), though individuals of more than 18 feet (5.5 metres) have been reported; Central American boas rarely exceed 8 feet (2.4 metres). The number of boa constrictor subspecies is disputed, ranging from 6 to 11.

The head of the boa constrictor is long and triangular, with dark streaks from the eyes to the back of the jaw and another dark streak along the top. The basic coloration is deep brown-and-black markings—often in the shape of triangles, ovals, and joined ovals—against a pale brown-and-gray background. However, colours and markings frequently vary, not only among the subspecies but also among individuals in the same population. In Boa constrictor ortonii, native to Peru, markings on the tail are red rather than brown, and the tail pattern is distinct. The Argentine boa constrictor (Boa constrictor occidentalis) is silvery gray with an unusual network pattern.

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The boa constrictor is active from dusk to dawn, feeding on a wide variety of birds and mammals. It is mostly terrestrial but climbs into trees in search of birds. In daytime it shelters in tree hollows, old logs, and animal burrows. It kills by constriction, first grasping the prey and then using its coils to exert a deadly amount of pressure. Slow moving and of a mild temperament, it is easily tamed. Farmers keep the snake around their fields and storage sheds to reduce the rodent populations. The red-tailed boa (Boa constrictor constrictor) is a popular exotic pet.

Boa constrictors bear live young about 1 to 2 feet (0.3 to 0.6 metre) long. Each litter numbers from one to several dozen young.

This article was most recently revised and updated by Amy Tikkanen.

Boa constrictor | Description, Size, Subspecies, & Facts (2024)

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Boa constrictor | Description, Size, Subspecies, & Facts? ›

The snake's adult length is typically about 10 feet (3 metres), though individuals of more than 18 feet (5.5 metres) have been reported; Central American boas

boas
boa constrictor, (Boa constrictor), large thick-bodied snake of the boa family, Boidae. Its range is wide, from Argentina to northern Mexico. Though it thrives in tropical rainforests, it also inhabits savannas, cane fields, and semiarid scrublands.
https://www.britannica.com › animal › boa-snake-family
rarely exceed 8 feet (2.4 metres). The number of boa constrictor subspecies is disputed, ranging from 6 to 11.

What are some interesting facts about the boa constrictor? ›

After a large meal, a boa doesn't need to eat again for weeks. A boa constrictor grows throughout its whole life, which can be 20 to 30 years. An adult boa will generally weigh more than 100 pounds (45 kilograms) and grow to about 13 feet (4 meters) long. Boa constrictors tend to live alone.

What are the different sizes of boas? ›

The boa constrictor is a large, heavy-bodied snake. Their body markings consist of beige blotches on a dark brown background. Adults range in size from 2.4-3 m (8-10 ft.); some boas can exceed 3.6 m (12 ft.), but lengths of over 11 feet are extremely rare; newborn boas measure about 60 cm (24 in.)

What is the average size of a boa constrictor? ›

Basic description. Most adult Boa Constrictors are about 10-16 feet (3-5 m) in total length. These are very large, stout-bodied snakes with dark brown hourglass-shaped saddles down the body that become reddish bands towards the tail. The background coloration is usually tan, light brown, grayish brown, or cream colored ...

What is the largest species of boa constrictor? ›

Boa constrictor occidentalis (Argentine Boa)

These are some of the largest Boas, with females averaging around 10' (3m) long, and males smaller.

What is the lifespan of a boa constrictor? ›

Boas are about 2 feet long when they are born and grow continually throughout their 25 to 30-year lifespan.

How strong is a full grown boa constrictor? ›

The strongman of the snake world, a boa constrictor is capable of exerting 6 to 12 lbs per square inch of pressure, and literally squeezes the life out of its prey, as Steve found when he tested this… on himself! Not a situation many of us would like to find ourselves in.

What is the rarest species of boa? ›

The Cropan's boa, native to Brazil's Atlantic Forest, hadn't been seen alive since its discovery in 1953. The rarest boa on Earth has been discovered in the rapidly shrinking Atlantic Forest outside São Paulo.

What age are boas fully grown? ›

At 3–4 years, boa constrictors become sexually mature and reach the adult size of 6–10 feet (1.8–3.0 m), although they continue to grow at a slow rate for the rest of their lives. At this point, they shed less frequently, about every 2–4 months.

What is the most docile boa constrictor? ›

Colombian boa constrictors are some of the most docile, while imported Mexican and Central American boas tend to be a bit more aggressive.

How big of an animal can a boa constrictor eat? ›

Depending on the size of the snake, boas may eat rodents, birds, lizards, frogs, and small to medium-sized mammals like opossums, monkeys, pigs, or deer. Some anacondas have been known to eat prey as large as a young tapir or even a caiman.

How big are rainbow boas? ›

Brazilian rainbow boas are a medium sized, round-bodied terrestrial boa and range from 4 to 6 feet (1.2 to 1.8 meters) in length. The head is not particularly large, but it is distinctly wider than the neck.

What snake is bigger than the boa constrictor? ›

Reticulated python (32.8 feet)

Another South Asian native, the reticulated python (Malayopython reticulatus) — decorated with a pattern of repeating diamond shapes that give it its name — is widely recognized as the longest snake on Earth today.

Which is bigger green anaconda or boa constrictor? ›

Both snakes are considered primitive because they have two lungs and vestigial leg bones, but boas have fewer bones in their head, and fewer teeth. Finally, pythons are, on average, larger than boas. Anacondas (a type of boa) can reach 30 feet, but most boas stay at 18 feet or less.

What eats boas? ›

A couple of specific boa constrictor predators include powerful avians such as the white-bellied sea eagle and the wedge-tailed eagle. Boa constrictors are also occasionally eaten by mammalian and fellow reptilian creatures -- think jaguars and crocodiles, for example.

How fast is a boa constrictor? ›

They can't move very fast, only about 1 mile per hour (1.6 kilometres per hour) on open ground. But since they don't have to chase their food, they don't need to travel quickly. Boa constrictors can swim; most don't spend significant time in water.

Does boa constrictor have teeth? ›

The common boa constrictor (Boa constrictor) is a large snake that can reach lengths of up to 4 m. Its teeth are sharp and recurved (Fig. 7.13). With four rows of teeth in the upper jaw and two in the lower, there are well over 100 teeth in the dentition.

Are boa constrictors deaf? ›

Our study further debunks the myth that snakes are deaf. They can hear – just not as well as you or I. Snakes can only hear low frequencies, roughly below the 600Hz mark, whereas most of us can hear a much wider range. Snakes probably hear muffled versions of what we do.

How old is the oldest boa constrictor? ›

Boas can live up to 25 years in the wild and up to 30 years or more in captivity. The oldest common boa in captivity was recorded to have lived 40 years.

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