Serratella ignita (BWO) fly fishing
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Serratella nymph and larva can be found in small and bigger rivers at several altitudes, up to more than a 1000 meters. I have found BWO larvae under the pebbels of stony bottom streams as well as in the waterplants of the chalk streams. This confirms an attidute to survive in different habitats. A good imitating pattern is also its nymph stadium, considering that they tend to drift for long distances before finally hatching out as winged insects. (in the picture: S.ignita larva)