Dark Slate-Winged Olives
This common name refers to only one species.
These are sometimes called Dark Slate-Winged Olives.
Drunella flavilinea (Flav) Mayfly Nymph
View 6 PicturesAlthough the identification is not certain because the nymph is not yet mature, the configuration of tubercles (
Tubercle: Various peculiar little bumps or projections on an insect. Their character is important for the identification of many kinds of insects, such as the nymphs of Ephemerellidae mayflies.) on this one--particularly the forefemora--seems to best match Drunella flavilinea.
A few (not all) of the abdominal tubercles on this Ephemerella needhami
nymph are circled. They are especially large in this species.
Collected July 2, 2019
from in Added to Troutnut.com by on July 18, 2019