Family Colubridae is a term used to refer to a family of non-venomous snakes that are found all over the world except Antarctica. There are several synonyms for the term. In some regions, they are called "typical snakes" as they are the most common type of snake found in those areas. In other regions, they are referred to as "grass snakes" as they are commonly found in grassy areas. They are also known by the name "rear-fanged snakes" due to their unique teeth structure. Some people also refer to them as "rat snakes" as they are known to feed on rodents. Despite the different names, Family Colubridae remains an important family of snakes in the world.