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Hi-Float Spent Mayfly - Trout FlyHi-Float Spent Mayfly. The Hi-Float Spent Mayfly is a great Trout Fly. This fly is fished in the style of Mayflies or Trout Flies or Dry
Emphemera Danica, Emphemera Vulgata - Mayfly
Hi-Float Spent Mayfly. The Hi-float Spent Mayfly is a great Mayfly imitation. The life cycle of the Hi-float Spent Mayfly is made up of four stages. It commences with the fertilised female flying over the water with her body in the water. The eggs of Mayfly imitated by the Hi-float Spent Mayfly fall to the bottom of the water where, after time, they develop into young nymphs. The home of the Hi-float Spent Mayfly nymph is a tunnel which they have created in the sand and mud of the riverbed. A distinctive character, the Hi-float Spent Mayfly nymph have a long body with three long tails. Their strong jaws mean they are able to feed on plant material that they are able to scrape off the stones and rocks of the riverbed. The female Hi-float Spent Mayfly nymph is the bigger of the species, indeed she can grown up to 35mm.
The Hi-float Spent Mayfly nymph moults many times during its life. Their mode of movement (the take in of water that is ejected swiftly to propel themselves) enables them to swim to the surface. Having lived at the bottom as a nymph for up to two years, here at the surface they can move freely but are naturally extrememly susceptible.
It is when at the surface that the Hi-float Spent Mayfly sub-imago or dun emerges. This means the Hi-float Spent Mayfly is able to fly immediately but better weather does enable them to get airborne more easily! Unfortunately bad weather means the delay in getting airborne increases their risk of being eaten up by a passing trout. However once they are free-flying, first stop is a nearby rock or safe place for the final moult to take place. This final stage is known as the imago (spinner) which means the Hi-float Spent Mayfly is able to show its true colours with beautiful shiny wings.
You may notice courting males swarming over the water. For the unsuspecting female who happens to fly by, a male will literally grab her from below and mate with her. The male however pays the ultimate price and, after mating, the male dies. The female Hi-float Spent Mayfly starts laying her eggs almost straight away by flying over the water and dropping her body into the water as we discussed earlier. Once she has released all her eggs, she too will die, becoming dinner for a lucky passiing trout!
The Hi-float Spent Mayfly fly is fished in the style of Dapping Flies or Mayflies or Humpies & Irresistibles or Trout Flies or Dry
Nypmh: up to 35mm
Adult: up to 30mm
| Distribution||Across the UK but paramount in Northern England and Scotland|
Ephemera Danica - fast flowing water
Ephemera Vulgata - slow flowing water with muddy bed
| Hatch||Early afternoon through to early evening|
| Description||Nymph - Milky coloured body with darker markings and three long tails|
| Sub-imago||Dappled wings with brown markings, body grey/white in male and milky/yellow in the female. Both with long tails|
| Imago||Pale body with shiny see-through wings. Veins can be seen. Rear wings smaller than forewings. Three long tails. |