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Rhithrogena semicolorata is a species of mayfly in the Heptageniidae family.

This species is widespread in Britain, inhabiting fast-flowing streams with stony bottoms. This species has two tails, and the forewing is bronze, and can appear yellow in flight. The femur has a brown streak on the centre.
Rhithrogena semicolorata TL

When Rhithrogena semicolorata is active

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