уторак, 09. фебруар 2010.
Serratella ignita is one of the most famous and common aquatic insect of Europe. That mayfly is important food for trout, grayling, chub and other fish species. Its way of hatching is such that attracts the attention of fish. Completely unprotected nymph emerges from the bottom surface of open water. It lives in various types of fresh water. It is not sensitive to pollution, so we can find it in the trout area as well as in the area of chub. From the moment when the nymph hatch to subimago, it got the name Blue Winged Olive Dun, famous BWO. Subimago BWO spend some time floating on the surface of water. Nearly motionless, it is easy prey for fish. When Its wings are dry enough, subimago fly to a nearby rock, tree or wall. There is later another transform, to adult imago-spinner. Spinner body is no longer olive, nor are his wings greyish-blue-dun. Now, it has transparent wings and rusty-brownish body. Adult females return to water to lay eggs. This is the last chance for the fish to grab that insect.