Jan Hamrsky / Diving Beetle (Rhantus suturalis). Czech Republic. Controlled conditions.

Jan Hamrsky / Great Diving Beetle (Dytiscus marginalis) larva feeding on small fish. Czech Republic. Controlled conditions.

Jan Hamrsky / Water Strider / Pond Skater (Gerris lacustris) portrait. Europe, August.

Jan Hamrsky / Spread-winged Damselfly (Lestidae) nymph portrait. Europe, July.

Jan Hamrsky / Needle Bug / Water Stick Insect (Ranatra linearis) portrait. Europe, August.

Jan Hamrsky / Mosquito (Culex pipiens) larva below its pupa case. Europe, August.

Jan Hamrsky / Mosquito (Culex pipiens) adult emerging through water surface from larva. Europe, August.

Jan Hamrsky / Portrait of Darner Dragonfly (Aeshna) nymph. Europe, September.

Paul Hobson / Emerald Damselfly (Lestes sponsa) larvae. Derbyshire, UK, July.

Paul Hobson / Emerald Damselfly (Lestes sponsa) larvae. Derbyshire, UK, July.

Paul Hobson / Water Boatman / Common Backswimmer (Notonecta glauca) at water surface. Derbyshire, July.

Jan Hamrsky / Narrow-winged Damselfly larva (Coenagrionidae). Czech Republic. Controlled conditions.