Millcreek on Feb 24, 2015February 24th, 2015, 5:48 am EST
These are relatively common in Mill Creek, a tributary of the Russian River.
They're found in pools on the side and top of rocks. They use a net to capture diatoms and algae. The net sits flat on the rock usually over a small declivity.
When ready to pupate, the larva leaves the net and finds a large rock, spins a covering of silk and sand and begins pupation. Pupae are usually found on the top or side of a rock.
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