The boa constrictor (Boa constrictor), also called the red-tailed boa or the common boa, is a species of large, heavy-bodied snake that is frequently kept and bred in captivity. The boa constrictor is a member of the family Boidae, found in tropical North, Central, and South America, as well as some islands in the Caribbean.
Formerly, boas were said to be found in the New World and pythons in the Old World. While this is true of boine boas, other boid species are present in Africa, much of southern Eurasia, Madagascar, New Guinea, and the Solomon Islands, so this is not accurate. However, they seem more abundant in evolutionarily isolated areas.
Common names: Old World sand boas. The Erycinae are a subfamily of nonvenomous snakes, commonly called boas, found in Europe, Asia Minor, Africa, Arabia, central and southwestern Asia, India, Sri Lanka, and western North America. Three genera comprising 15 species are currently recognized.
Rubber boas are the most northerly of boa species. The distribution of rubber boas covers a large portion of the western United States, stretching from the Pacific Coast east to western Utah and Montana, as far south as the San Bernardino and San Jacinto Mountains east of Los Angeles in California, and as far north as southern British Columbia.
Titanoboa, / t i ˌ t ɑː n oʊ ˈ b oʊ ə / is an extinct genus of snakes that is known to have lived in present-day La Guajira in northeastern Colombia. Fossils of Titanoboa have been found in the Cerrejón Formation, and date to around 58 to 60 million years ago.