This nighttime flash photograph shows a bunch of Ephoron mayflies flying around during the hatch.  So many of them fly around with their dun shucks attached that it seems like they molt from the dun to spinner stage in mid-air.  Actually they molt on streamside vegetation like other mayflies, but they sometimes take off to mate before they're completely finished. From unknown in Wisconsin.
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This nighttime flash photograph shows a bunch of Ephoron mayflies flying around during the hatch. So many of them fly around with their dun shucks (

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.) attached that it seems like they molt from the dun to spinner stage in mid-air. Actually they molt on streamside vegetation like other mayflies, but they sometimes take off to mate before they're completely finished.

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