Colubridae is the snake family that includes North American kingsnakes and milk snakes.
Colubridae is a very large and diverse family of snakes. Its members occupy habitats on every continent except Antarctica and include harmless constrictors, mildly venomous species and specialized predators. Kingsnakes and milk snakes are commonly placed in the subfamily Colubrinae.
Kingsnakes are famous for eating other snakes, including venomous species, and for their strong constricting ability. Milk snakes are known for colorful bands that can resemble those of coral snakes, a classic example of protective mimicry.
Older references often called most familiar non-venomous snakes “colubrids,” but modern genetic studies have reorganized the family. Some snakes formerly included in Colubridae are now placed in other families, so the exact membership depends on the classification being used.