Jan Hamrsky / Close-up of Backswimmner / Water Boatman (Notonecta glauca) 'oar' leg used for propulsion. Europe, August.
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Jan Hamrsky / Backswimmer / Water Boatman (Notonecta glauca) under water surface. Europe, September.
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Jan Hamrsky / Backswimmer / Water Boatman (Notonecta glauca) on stem. Europe, September.
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Jan Hamrsky / Backswimmer / Water Boatman (Notonecta glauca) under water surface. Europe, September.
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Jan Hamrsky / Water Beetle (Rhantus suturalis: Dytiscidae). Europe, May.
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Chris Shields / Illustration of Water beetle (Colymbetes fuscus),bottom left; Mayfly (Ephemeroptera sp.), centre; and Mosquito (Culicidae sp.) right; with larvae.