Insect Order Ephemeroptera (Mayflies)
Taxonomic Navigation -?-
Kingdom Animalia (Animals)
» Phylum Arthropoda (Arthropods)
» Class Insecta (Insects)
» Order Ephemeroptera (Mayflies)
8 families aren't included.
Common Name
| Match | Common Name |
| Mayflies |
Fly Imitations by Orvis
| Stage | Fly Pattern |
| Nymph | Hare's Ear |
| Nymph | Pheasant Tail |
| Nymph | RS2 |
| Dun | Adams |
| Dun | CDC Comparadun |
| Dun | Sparkle Dun |
| Spinner | AK's Spinner |
This is page 4 of streamside pictures of Ephemeroptera. Visit the main Ephemeroptera page for:
- The behavior and habitat of Ephemeroptera.
- Studio pictures of 516 Ephemeroptera specimens.
- 67 underwater pictures of Ephemeroptera.
32 Streamside Pictures of Mayflies:

After I took this photo, this specimen was swept out of this tiny pool into a riffle downstream, where I swooped it up with my aquarium net and brought it home to photograph. See it up close here.
In this picture: Mayfly Species Paraleptophlebia adoptiva (Blue Quill).
In this picture: Mayfly Species Paraleptophlebia adoptiva (Blue Quill).

A freshly emerged female Drunella lata dun.
In this picture: Mayfly Species Drunella lata (Large Blue-Winged Olive).
In this picture: Mayfly Species Drunella lata (Large Blue-Winged Olive).

I didn't manage to collect a nymph, but here's the hollow shuck (
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.) left over from an emerged dun, showing the basic pattern of the nymph.
In this picture: Mayfly Species Ephemera guttulata (Green Drake).

Here's an underwater view of the pupal shucks of several already-emerged Brachycentrus numerosus caddisflies.
In this picture: Mayfly Species Ephemera guttulata (Green Drake).

I photographed the underside of this March Brown dun right after it emerged so that I would have the exact color for an imitation.
In this picture: Mayfly Species Maccaffertium vicarium (March Brown).
In this picture: Mayfly Species Maccaffertium vicarium (March Brown).

The underside of a freshly emerged Ephemerella invaria dun.
In this picture: Mayfly Species Ephemerella invaria (Sulphur).
In this picture: Mayfly Species Ephemerella invaria (Sulphur).

Here's the bottom of a freshly emerged male Drunella lata dun, showing a lighter shade of olive than the specimens I photographed with my better camera in the evening.
In this picture: Mayfly Species Drunella lata (Large Blue-Winged Olive).
In this picture: Mayfly Species Drunella lata (Large Blue-Winged Olive).

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).

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's a fresh ball of eggs from a Hendrickson spinner, photographed to show the proper color for the egg-ball on spinner patterns.
In this picture: Mayfly Species Ephemerella subvaria (Hendrickson).
In this picture: Mayfly Species Ephemerella subvaria (Hendrickson).
