Boas are long and large snakes that are native to South America, Central America, and Mexico. They belong to the family of Boidae, which also includes pythons. There are several synonyms that can be used to refer to boas, including constrictors, serpents, snakes, pythons, and anacondas. These names are often used interchangeably to describe any snake that is large and capable of killing its prey by constriction. Boas are known for their size and strength, making them a popular subject of fascination for many people. Some species of boa, such as the green anaconda, can grow up to 30 feet in length and weigh over 500 pounds.