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

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Also known as: Boa constrictor

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boa constrictor

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Argentine boa constrictor
red-tailed boa
Boa constrictor ortonii
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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)

FAQs

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
The true boas are divided into two subfamilies, Boinae and Erycinae. Boinae includes the boa constrictor (Boa constrictor), tree boas (genus Corallus), and anacondas (genus Eunectes) of the American tropics; two other genera are found on Madagascar and islands of the southwestern Pacific.
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? ›

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 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. The largest boa constrictor ever found measured 18 feet.

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.

Do boa constrictors like to be held? ›

Some boas seem to genuinely appreciate handling, and others don't care for it. Respect the fact that the snake is an individual, and treat it according to its wishes. If, despite your best efforts, it prefers to be left alone, then let it be a beautiful display animal.

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 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.

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.

Do male or female boa constrictors get bigger? ›

Clear sexual dimorphism is seen in the species, with females generally being larger in both length and girth than males. The usual size of mature female boas is between 7 and 10 ft (2.1 and 3.0 m) whereas males are between 6 and 8 ft (1.8 and 2.4 m).

Do boa constrictors bond with humans? ›

Your pet snake may become comfortable around you while still being wary of strangers. However, snakes likely don't bond with people on the same level as a dog would. They probably won't feel sad when you're away or require playtime with you.

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.

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.

How long can a boa constrictor hold its breath? ›

“They do this for 10, 15, up to 45 minutes,” said Elizabeth Brainerd, an evolutionary biologist at Brown University. “And that takes quite a bit of energy, so they have to be breathing.” Dr.

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.

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