A nice-to-see mayfly

Not a mayfly you see every day of the week

Not a mayfly you see every day of the week

This mayfly – it’s either the Claret Dun or the Sepia Dun (the entomologists names are Leptophlebia marginata and Leptophlebia vespertina) – is not one you will see every day in lowland Britain – it needs acid water so in the south its only in heathy, peaty places.

Its not a great rarity but we only found it in about 10% of the high quality unpolluted ponds of the National Pond Survey; it was found in similar proportion of the best rivers by the Centre for Ecology and Hydrology. So seeing it is part of a nice day out.

I took this picture in my tray – so not a great pic. but it’s what you see.

It’s interesting that it can live in such small ponds as this one – if you could get the conditions right, and you lived near to other acid waters, it seems quite possible you could get this to colonise garden ponds.

copy-of-smallpondnearpilley

To be certain which of the two species you have needs a microscope.

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