---

Look for delicate bright green flies sitting on leaves near the river. They are often found in large numbers near mud (riverside, muddy paths etc.), especially in shadow. Larger species (Dolichopus, Argyra, larger Rhaphium etc.) usually sit on leaves on the edge of mud, smaller species (Campsicnemus, Rhaphium) frequent the mud surface. If you find some semi-permanent mud (ie. wet through the year) you'll certainly find these flies too.