Autumn Green Drakes
This common name refers to only one species.
These are very rarely called Autumn Green Drakes.
This species is very similar to
Drunella flavilinea. In areas where their ranges overlap, they can sometimes be found in the same streams. Allen and Edmunds (1962) say that
Drunella coloradensis tends to favor colder water than
Drunella flavilinea and that it may emerge as much as a month later.