» Genus Isonychia (Slate Drakes)
12 species aren't included.
This is page 2 of specimens of Isonychia. Visit the main Isonychia page for:
- The behavior and habitat of Isonychia.
Pictures of 20 Mayfly Specimens in the Genus Isonychia:
Isonychia bicolor (Mahogany Dun) Mayfly Nymph
View 7 PicturesThis Isonychia bicolor nymph from the Catskills displays the prominent white stripe sometimes characteristic of its species. This is the first such specimen I've photographed, because members of the same species in the Upper Midwest have a more subdued stripe (and were once thought to be a different species, Isonychia sadleri). The striking coloration on this eastern nymph is more appealing.