no photo — written note
Insects
Big dark clawed larva of the dobsonfly, living under riffle rocks for years.
Field facts
HabitatFast rocky riffles
RangeStatewide
When to lookYear-round
StatusSecure; clean-water indicator (Indiana DNR / IUCN Red List)
Look-alikesFishfly larvae, Beetle larvae
Field note: It spends up to three years in the stream before one summer as an adult.
Lesson
Watching responsibly
Replace every rock you lift; the whole community lives under it.
Pinches hard with strong jaws; handle at the sides.
Your records
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