Lower Avon invertebrate sample

Michael collected, sorted and identified an invertebrate from the lower Avon at Delnashaugh about three weeks ago so it is about time I posted the results on here.

First the standard picture:

Sorted in the usual format with mayflies top left, beetles top right, caddis bottom right and stoneflies bottom left.

Sorted in the usual format with mayflies top left, beetles top right, caddis bottom right and stoneflies bottom left.

The sample was dominated by stoneflies, mostly Leuctridae (Needle flies) with a few of the larger species. There were over 200 aquatic beetles, both adults and larvae. Quite a productive sample for mid summer. Obviously more than adequate for the large head of juvenile fish in the lower Avon, quite a contrast with the very sparse sample from the upper Avon.

Lower Avon invertebrates

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