Another warm day of dipping hat in river to cool me down. 28 species of hoverfly recorded, best were Platycheirus rosarum (f), Scaeva pyrastri (4), Cheilosia bergenstammi (first of summer brood), Xanthogramma pedissequum (3m) and Sericomyia silentis (m). Eristalis numbers building nicely with pertinax (60) the most numerous.
Other stuff seen included a very late Dark Green Fritillary and the gall mite Acalitus brevitarsus on Alder which was new for the valley and the Dark Giant Horsefly, which was a beast.
Scaeva pyrastri
Acalitus brevitarsus - gall mite on Alder
Agromyza alnivora - leaf-mining Fly
Dark Green Fritillary
Dark Giant Horsefly
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