Autumn Dun - Ecdyonurus dispar


A dark brown bodied species. The wings are clear with a pattern of dark veins. Nymphs are described in Identification Aids below.

Identification aids



Ecdyonurus dispar is typically found in riffle areas of rivers and larger streams. It can also occasionally be found on the wave-lashed shores of larger standing waters.

When to see it

As its name suggests, it is an autumn and late summer species.

Life History

The nymphs are usually found clinging to submerged plants and stones, although they may swim if disturbed. It feeds either by scraping periphyton from the substrate or by gathering fine particulate organic detritus from the sediment. Once mated, the female rests on a stone above the water and lays around 2500 eggs directly on the river bed by dipping the tip of her abdomen under the surface.

UK Status

Thought to be widespread in suitable habitats throughout Britain.

VC55 Status

Status in Leicestershire and Rutland not known.

Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map

Species profile

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