Mayfly Species Isonychia bicolor (Mahogany Dun)
Taxonomic Navigation -?-
Kingdom Animalia (Animals)
» Phylum Arthropoda (Arthropods)
» Class Insecta (Insects)
» Order Ephemeroptera (Mayflies)
» Family Isonychiidae (Slate Drakes)
» Genus Isonychia (Slate Drakes)
» Species bicolor (Mahogany Dun)
Common Names
| Match | Common Name |
| Mahogany Dun | |
| Dun Variant | |
| White-Gloved Howdy | |
| Slate Drake | |
| Leadwing | |
| Large Mahogany Dun | |
| Great Red Spinner | |
| Maroon Drake | |
| Dark Red Quill | |
| Leadwing Coachman | |
| Mahogany Drake | |
| Great Lead-Winged Coachman |
This is page 2 of streamside pictures of Isonychia bicolor. Visit the main Isonychia bicolor page for:
- The behavior and habitat of Isonychia bicolor.
- Studio pictures of 19 Isonychia bicolor specimens.
5 Streamside Pictures of Isonychia bicolor Mayflies:

This is just about the most Isonychia bicolor shucks (
Shuck: The shed exoskeleton left over when an insect molts into its next stage or instar. Most often it describes the last nymphal or pupal skin exited during emergence into a winged adult.) I've ever seen on the rocks, and appropriately enough they're on the river where Art Flick described them in his Streamside Guide.
In this picture: Mayfly Species Isonychia bicolor (Mahogany Dun).

Here's an underwater view of the pupal shucks of several already-emerged Brachycentrus numerosus caddisflies.
In this picture: Mayfly Species Isonychia bicolor (Mahogany Dun).

Here are the empty nymphal cases of Isonychia bicolor mayflies which hatched in early fall in the Catskills by crawling out onto a rock.
In this picture: Mayfly Species Isonychia bicolor (Mahogany Dun).
In this picture: Mayfly Species Isonychia bicolor (Mahogany Dun).
