Pet Boa Constrictors reach similar lengths to their wild counterparts, probably because length is a polygenic trait. Species: Male size: Female size: Common Boa ( Boa imperator) 3 to 6ft (1 to 1.8m) 4 to 8ft (1.2 to 2.4m) Sonoran Boa ( Boa sigma) roughly 4ft (1.2m) up to 6ft (1.8m) Red Tail Boa ( Boa constrictor) up to 8ft (2.4m) up to 13ft (3.9m) How big do pet Boa Constrictors get? The result is – rather unsurprisingly – that they are the smallest species of Boa so far recognised. Out there, food, water and hiding places are all scarce. Sonoran Boas, on the other hand, live in the Sonoran Desert biotope. Red Tail Boas grow the largest, coming from rich, densely forested tropical areas where they have had room to evolve into very large snakes. They’re all tough, hardy survivors, but some habitats just allow for animals to reach a larger size. Remember that these weights are highly variable – these are broad guidelines only! Species Male Female Red Tail Boa ( Boa constrictor) 15 to 40lbs (7-18kg) 25 to 60lbs (12-27kg) Common Boa ( Boa imperator) 10 to 20lbs (4.5-9kg) 18 to 33lbs (8-15kg) Sonoran Bao ( Boa sigma) 10-20% lighter than Common Boas 10-20% lighter than Common Boas Boa Constrictor Size in feetĪs you may have guessed from the weight table above, Boa Constrictors also vary greatly in length according to their species.

A nice Red Tail Boa ( Boa constrictor) Boa Constrictor weight chart In fact, Ball Pythons, Hognose Snakes, and Garter Snakes, all have larger females than males. You may notice a similar pattern of sexual size dimorphism in other snake species. This is the direct cause of their larger size when compared with males. Females need a bigger body to accommodate these large litters, and more fat reserves to provision them with. Boas have a lot of babies in one go – anywhere from a dozen to over 40. Whichever species you choose, females are almost always longer and heavier than males. Check out the table at the end of this section for a rough guide. The other two species are smaller and a lot lighter. These snakes can achieve lengths of up to 12 feet, and weights of as much as 90 to 100lbs (45kg), though 25 to 60lbs (12-27kg) is more common. There are three species, which we’ll discuss in a moment, but the largest is by far the True Red Tail Boa ( Boa constrictor). If you want to know how much your Boa will weigh, the main thing to consider is the species. Once it reached 8 or 9ft, though, its growth would have slowed down and it would have gotten just as heavy as the other one. Unfortunately, I sold it (you can’t keep them all) so I don’t know how big it eventually got. However, the 7ft long snake was younger and still growing at a fast pace. There was nothing wrong with either of these animals. Their girth and weight also tend to increase as they mature, with older animals being stockier and heavier than younger ones of a similar length.įor example, I can personally remember handling an 8ft long Red Tail Boa that weighed 26lbs (12kg), and a 7ft long one that weighed only 15lbs (7kg). By this I mean any species whose scientific name starts with “ Boa”. This is especially true of heavy-bodied species, like those in the Boa complex. One thing you’ll know if you’ve kept snakes is that their weight increases almost exponentially as they get longer.

Boa constrictor large