Will Watson / Diving beetle (Graphoderus cinereus) with Ciliates, Moccas Park, National Nature Reserve, Herefordshire, England, UK. Vulnerable species.

Will Watson / Diving beetle (Graphoderus cinereus) with Ciliates, Moccas Park, National Nature Reserve, Herefordshire, England, UK, June. Vulnerable.

Will Watson / Mud dweller beetle (Ilybius ater) at rest on Hornwort (Ceratophyllum demersum), Carmarthenshire, Wales. Captive.

John Abbott / Predacious diving beetle (Cybister fimbriolatus) swimming Williamson County, Texas, USA Controlled conditions. October

John Abbott / Predaceous diving beetle (Thermonectus basillaris), Tuscaloosa County, Alabama, USA Controlled conditions. July

Jan Hamrsky / Diving beetle (Haliplus ruficollis), Europe, June. Controlled conditions.

Jan Hamrsky / Water scavenger beetles (Helochares obscurus), Europe, May. Controlled conditions.

Jan Hamrsky / Water scavenger beetle (Helochares obscurus) female with air bubble around body, Europe, May. Controlled conditions.

Jan Hamrsky / Diving beetle (Platambus maculatus), Europe, August. Controlled conditions.

Jan Hamrsky / Diving beetle (Colymbetes fuscus), Europe, June. Controlled conditions.

Jan Hamrsky / Water scavenger beetle larva (Hydrophilidae) on Horsetail (Equisetum sp) Europe, May. Controlled conditions.

Jan Hamrsky / Water scavenger beetle larva (Hydrophilidae) swimming in water column, Europe, May. Controlled conditions.