The stoneflies are a small order of winged insects which usually occur near water. The nymphs live in fresh water, primarily in fast running streams and in alpine lakes. The imagines are poor fliers, and rarely move far from the hatching site. Both nymphs and imagines are popular food for fish, and many species are used as models for the artificial flies used by anglers.

Stoneflies
| Hallvard Elven | Leif Aarvik | Naturhistorisk museum, Universitetet i Oslo
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