Mayfly Species Isonychia bicolor (Mahogany Dun)

Mayflies Caddisflies Stoneflies

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:

Streamside Photo Page:12

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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).

RegionUpper Midwest

Date TakenAug 24, 2004

Date AddedJan 17, 2006

CameraOlympus C740UZ

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This is just about the most Isonychia bicolor shucks (

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Here's an underwater view of the pupal shucks of several already-emerged Brachycentrus numerosus caddisflies.

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).

RegionCatskills

Date TakenSep 7, 2006

Date AddedOct 4, 2006

CameraPentax Optio WPI

Streamside Photo Page:12

Jargon Defined:

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Here's an underwater view of the pupal shucks of several already-emerged Brachycentrus numerosus caddisflies.

Shucks: 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.

Useful References: