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Female Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs) Mayfly Dun Pictures

 I found this little dun floating down the water's surface stuck in her nymphal shuck (
Here's an underwater view of the pupal shucks of several already-emerged Brachycentrus numerosus caddisflies.
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.
)
. Such stillborn (
This stillborn Ephemerella subvaria dun is trapped in its shuck.
This stillborn Ephemerella subvaria dun is trapped in its shuck.
Stillborn: In fly fishing, a stillborn insect is one which got stuck in its nymphal or pupal shuck during emergence and floats helplessly on the surface instead of flying away. It is a specific class of cripple, although it is sometimes used interchangeably with that term.
)
insects are sometiems targeted by the trout. I brought this one home to photograph since it's a species I don't have yet, but I haven't figured out which one.


This mayfly was collected from the Bois Brule River on July 1st, 2005 and added to Troutnut.com on April 22nd, 2006.


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