The unicolor cribo (Drymarchon melanurus unicolor) is a Central American subspecies of the cribo snakes. The eastern indigo snake, Drymarchon corais couperi is another species of this genus. Until recently the unicolor cribo was considered a subspecies of the same species as the indigo snake Drymarchon corais unicolor. Unlike the indigo snake, which is dark blue to almost black, the unicolor cribo has a yellow or golden color with black facial and neck bar-like markings.