While Riverfly sampling today I found a number of these pictured below in the Erewash, I'm not able to make a definite ID and hoped our more capable Ento's might give me a hand with identifying.








Thanks in advance

Mick

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"I will give him seven feet of English ground, or as much more as he may be taller than other men"
http://derbyshireonthefly.blogspot.com/

That's an Alderfly larva Trugg

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Musha rig um du rum da

Cheers DB

Thats what we thought with a feathery tail and gills but thought they might be a little late in summer, thanks for your time. I might get the hang of it one day

Mick

__________________
"I will give him seven feet of English ground, or as much more as he may be taller than other men"
http://derbyshireonthefly.blogspot.com/

Could be either Sialis lutaria (Latin for mud is luturn) or Sialis fuliginosa. Colourwise probably the latter.

Glad to be of help Trugg.

Distinguishing between the species may not be a simple as looking at their colouration though - from Neuropterida of Britain and Ireland "Sialis lutaria (Linnaeus, 1758) is the commonest member of the genus Sialis, being found throughout England, Wales and Scotland in most static water bodies, although distribution is restricted in Ireland.

In order to distinguish Sialis lutaria (Linnaeus, 1758) from other species of Sialis, examination of the external genitalia (males) or anal plates (females) is required, but is relatively easy as no dissection is required.

The adults can found from April to October, sometimes in vast numbers, near to water and live for only a few days in order to breed. The eggs are laid on vegetation and after hatching the larva descend into the water where they predate on other invertebrates. After 12 – 24 months the larva pupate in debris and emerge as adults a few weeks later."

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Musha rig um du rum da