So what makes a snake what they are called? Boas and Pythons are subfamilies of Boidae. Colubrids: A large grouping of snakes that aren't boas, pythons, vipers, elapids, hydrophiids, leptotyphlopids, etc, etc. Colubrids are generally oviparous but there are exceptions.

What makes a snake a colubrid?

colubrid, any member of the most common family of snakes, Colubridae, characterized by the complete absence of hind limbs, the absence or considerable reduction of the left lung, and the lack of teeth on the premaxilla and usually having a loose facial structure, relatively few head scales, and ventral scales as wide ...

What is the biggest colubrid?

indigo snake, (Drymarchon corais), docile, nonvenomous member of the family Colubridae found from the southeastern United States to Brazil. It is the largest snake in the United States—record length is 2.6 metres (8.5 feet)—and one of the largest of all colubrids.