no photo — written note
Insects
Three-tailed nymph with feathery gills, clinging under riffle stones.
Field facts
HabitatClean riffles and stony runs
RangeStatewide
When to lookYear-round; hatches May to July
StatusSecure; clean-water indicator (Indiana DNR / IUCN Red List)
Look-alikesStonefly nymphs, Damselfly nymphs
Field note: Adults live a day or two, do not feed, and mate in swarming columns.
Lesson
Watching responsibly
Their presence grades water quality; keep silt and runoff out.
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