The big surprise was that I found huge numbers of black fly larvae for the first time -- large colonies on every single rock that I lifted (it's really a sickening sight!). They were also in the leaf packs. However, in every case they were genus Prosimulium -- the "good" (less tolerant) black fly. We found large numbers of black flies here in the spring (May), but they were all genus Simulium. (For the distinction see the previous entry.)
Wednesday, December 15, 2010
Stream Report -- Mechunk Creek
The big surprise was that I found huge numbers of black fly larvae for the first time -- large colonies on every single rock that I lifted (it's really a sickening sight!). They were also in the leaf packs. However, in every case they were genus Prosimulium -- the "good" (less tolerant) black fly. We found large numbers of black flies here in the spring (May), but they were all genus Simulium. (For the distinction see the previous entry.)
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