What is the scientific name of the common boa, a large constrictor found in the Americas?

The scientific name of the common boa is Boa constrictor.

Boa constrictor is a large, nonvenomous constrictor native to Central and South America and several Caribbean islands. It belongs to the family Boidae and kills prey by wrapping its muscular body around them and restricting circulation and breathing.

The species has a broad geographic range, so appearance varies considerably. Its base colour is commonly brown, grey, or cream, with darker saddle-like markings along the back. Adults may reach more than 3 metres, although size depends on locality, sex, and available food.

The common boa is often called a “red-tailed boa” in the pet trade, but that label can refer especially to populations with strongly reddish tail markings rather than every individual of the species. It is unrelated to the Burmese python, despite their similar constricting lifestyle.