Rosy Boas are a small, terrestrial, live bearing member of the Boidae family of snakes. They are a terrestrial (ground dwelling) species which is largely crepuscular but can often be seen out and about during the day. The name "Rosy" referred to their rosy colouration although this description has become less relevant over time due to many different subspecies, localities and morphs found within this species.
Most Rosy Boas have 3 longitudinal stripes which are well defined in specimens from desert regions whereas specimens from Coastal areas have stripes with much more jagged edges and spotting, often appearing to have no stripes at all. This is the Baja subspecies (Lichanura trivirgata saslowi) which are a beige/grey background colour with 3 orange/red/brown longitudinal stripes.