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Mayflies.

The trademark of fly fishing, not least among those searching for gold - brown trout. Spread all around the globe, mayflies are are among the most important insects for both fish and fisherman. It is important to carry imitations of all various stages - nymphs, emergers, duns and spent spinners.

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Latin: Ephemeroptera

The life cycle of a mayfly goes from egg to nymph and directly to adult insect. When the adult female has laid her eggs in the surface, she will die and fall on to the water with her wings spread out on each side of the body. During this stage the female is called spent spinner and when this last stage occurs it goes by the name spinner fall. 

All stage are of great importance to the fly fisher. Usually a mayfly hatch starts with the nymphs moving at the bottom and as the day progress, they will either swim or climb to the surface to hatch. The hatch usually starts of slowly and peaks during mid-day and afternoon. After the mating of adult mayflies, the female usually lays her eggs during late afternoon or earlier evning.

There are several hundred of mayflies species around the world and you will find them all the way from New Zeeland in the south, to Kamchatka, Russia, in the east. all the way up to norhtern Canada. Most species inhabit streams and rivers, but you will find those that only live in lakes.  
 
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