The pale dorsolateral spots are yellowish to ivory white. The dark markings are a rich chocolate brown to brownish black, sometimes with thin black margins. On some snakes the sides of the body are pale silver gray with pink or orange highlights. Generally, the patterns of boa constrictors from Colombia tend to include more bold black scales and even small black blotches on the sides than do the Central American specimens. The pale areas of pattern are relatively evenly sprinkled with small black flecks and entire black scales. Some blotches may contact the dark dorsal pattern. On the sides are a series of dark blotches with pale centers. In other patterns, the dark dorsal bars are not connected to other dark elements of pattern. There are more than 40 species of true boas (family Boidae). While the average weight of a male boa is 22-23 pounds, females can weigh anywhere from 22-35 pounds. In some boa constrictor patterns, the dark bars are connected along the sides to form a dark dorsal pattern on the back that outlines pale dorsal blotches that are oval or round. boa, common name for a variety of nonvenomous constricting snakes. These dark bars are each narrowest in the middle of the back and widest at the dorsolateral margin, where they incorporate a pale blotch on each side at the dorsolateral margin. The typical common boa constrictor is a pale snake that are primarily colored in shades of brown with a longitudinal series of 20 or more dark transverse bars spaced down the length of the back. ![]() It is possible for the females of this last group to reach lengths of up to 12 feet with weights up to 40 pounds or more. This group contains the largest group of boa morphs. The largest, as in size and commonly kept, of the BCI group is referred to as Colombian boas. ![]() The island boas are further broken down to the specific islands that they originate from and the Central American boas are often broken down to specific countries or geographic areas from which they originate. The groups can be broken down to the island boas, the Central American boas and the common boa. Not all localities have morphs associated within that locality group. With such a large range there are many different locality boas that are distinctly different in appearance from geographic area to geographic area. BCI ranges from the Sonora desert in Mexico through the north eastern areas of South America. Common boas or Boa constrictor imperator, come in many different sizes and colors, even though they are all classified as the same species.
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