Constrictor snakes are a type of snake that are known for their ability to constrict their prey. Boas are a subfamily of constrictor snakes, which are found in tropical and subtropical regions of the Americas, Africa, Asia, and some Pacific Islands. They are typically non-venomous and have a wide variety of sizes, ranging from small to large. Boas are also known for their distinctive patterned skin and their ability to climb trees.