Atractus medusa is a species of snake in the subfamily Dipsadinae of the family Colubridae. The species is native to northwestern South America.
The specific name, medusa, refers to the Greek mythological female monster, Medusa, who had venomous snakes for hair.
Atractus medusa is found in Colombia and Ecuador.
The preferred natural habitat of Atractus medusa is forest, at elevations from sea level to .
Atractus medusa is terrestrial.
The mode of reproduction of Atractus medusa is unknown.