Boidae

Boidae is a family of nonvenomous snakes that includes boas such as the boa constrictor and anaconda. Its members kill prey primarily by constriction.

Snake: A legless, elongated reptile in the suborder Serpentes. Boidae is one family within the broader snake lineage.
Constricting snake: A snake that subdues prey by coiling around it and applying pressure. Boas are among the best-known snakes that capture prey this way.
Boa constrictor: A large Central and South American boa species that kills prey by constriction. It is a widely recognized example of a boa in the family Boidae.
Pythonidae: A family of nonvenomous constricting snakes that includes pythons. Pythons resemble boas in body form and prey capture but belong to a separate family.
Serpentes: The reptile suborder comprising all snakes. Boidae sits within Serpentes, whose members share a distinctive limb-reduced body plan.
Constrictor: An animal that subdues prey by squeezing it, commonly referring to certain snakes. Constriction is a characteristic way boas subdue prey.
Snake scale: A keratin-covered plate forming part of a snake's outer skin. Overlapping scales help boas move across surfaces and protect their bodies.
Green anaconda: A large semiaquatic boa native to tropical South America. This boa illustrates the family's adaptation to aquatic habitats and very large body size.
Colubridae: A large, diverse family of snakes that includes many familiar nonvenomous species. Most snakes belong to Colubridae, not Boidae, and the family contains varied ecologies.
Squamata: The reptile order containing snakes, lizards, and amphisbaenians. Boidae belongs to the larger squamate radiation.

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TitanoboaNarrower topic: Titanoboa is generally placed among boid snakes.