no photo — written note
Insects
Two-tailed flat nymph needing the coldest, cleanest water available.
Field facts
HabitatCold clean riffles
RangeSouthern hill streams, northern spring creeks
When to lookYear-round; some hatch in winter
StatusSensitive to pollution (Indiana DNR / IUCN Red List)
Look-alikesMayfly nymphs, Hellgrammites
Field note: Some species hatch and crawl over snow in February.
Lesson
Watching responsibly
The strictest clean-water indicator in Indiana; protect headwaters.
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