Mass movement of black fly larvae on silken threads (Diptera: Simuliidae)
Stoppage of waterflow in a stream resulted in the migration of massive numbers of black fly larvae on silken threads. Larvae were found on single silken threads, but the heaviest concentrations were on “cables” composed of 25-50 individual silken threads. The larvae were attached in concentric rings around the silken threads and cables.
Annals of the Entomological Society of America↗