Jan Hamrsky / Great diving beetle (Dytiscus marginalis) portrait, Europe, September, controlled conditions
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Jan Hamrsky / Great Diving Beetle (Dytiscus marginalis) larva feeding on small fish. Czech Republic. Controlled conditions.
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Kim Taylor / Water beetles (Dytiscus marginalis) and (Acilius sulcatus) clustered around an air bubble trapped beneath the ice of a frozen pond, digitally enhanced, Surrey, England
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Jane Burton / Great Diving Beetle {Dytiscus marginalis} female taking air at water surface, Surrey, England.
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Will Watson / Head on view of Diving beetle (Cybister lateralimarginalis) resting among Bladderwort (Utricularia sp.) captive conditons, Belgium.
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Robert Thompson / Great diving beetle (Dytiscus marginalis) larva, Montiaghs Moss NNR, County Antrim, Northern Ireland, UK.
Jan Hamrsky / Great silver water beetle (Hydrophilus piceus) female, Europe, May. Controlled conditions.
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Jan Hamrsky / Great silver water beetle (Hydrophilus piceus) female, refilling its air store at water surface, Europe, May. Controlled conditions.
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Jan Hamrsky / Great silver water beetle (Hydrophilus piceus) female, refilling its air store at water surface, Europe, May. Controlled conditions.
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Jan Hamrsky / Great silver water beetle (Hydrophilus piceus) female, Europe, May. Controlled conditions.
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Will Watson / Black belly diving beetle (Dytiscus semmisulcatus), Cheshire, England, UK, July. Captive.
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MYN / Niall Benvie / Great diving beetle (Dytiscus marginalis) Burgundy, France. April.
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MYN / Niall Benvie / Great diving beetle (Dytiscus marginalis) Burgundy, France. April.
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MYN / Niall Benvie / Great diving beetle (Dytiscus marginalis) underwater, Burgundy, France. April.
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MYN / Niall Benvie / Great diving beetle (Dytiscus marginalis) underwater, Burgundy, France. April.
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MYN / Niall Benvie / Great diving beetle (Dytiscus marginalis) Burgundy, France. April.
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MYN / Paul van Hoof / Great diving beetle (Dytiscus marginalis) larva, June, The Netherlands, Meetyourneighbours.net project
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Jussi Murtosaari / Great diving beetle (Dytiscus marginalis) diving in aquarium, Kumlinge, Ahvenanmaa / Aland Islands Archipelago, Finland. November
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Jussi Murtosaari / Great diving beetle (Dytiscus marginalis) in aquarium, Kumlinge, Ahvenanmaa / Aland Islands Archipelago, Finland. November
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Jussi Murtosaari / Great diving beetle (Dytiscus marginalis) Photographed in aquarium, Kumlinge, Ahvenanmaa / Aland Islands Archipelago, Finland. November
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Ann & Steve Toon / British diving beetles (Dytiscus sp.), museum specimens, Tyne and Wear Archives and Museums
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Will Watson / Female Great diving beetle (Dytiscus circumflexus) at surface to breath, UK, captive.
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Will Watson / Female Great diving beetle (Dytiscus circumflexus) view of underside with cloacal sperm plug from previous mating, UK, captive.
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Will Watson / Male Great Diving Beetle (Dytiscus marginalis) taking in air, captive, Essex, England.
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Will Watson / Female Great diving beetle (Dytiscus circumflexus), resting on Hornwort, captive, UK.
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Will Watson / Female Great diving beetle (Dytiscus circumflexus), resting on Hornwort, UK, captive.
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Will Watson / Female Black Belly (Dytiscus semisulcatus) at surface for air, Llyn Heilyn, Radnorshire, Wales.
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Jan Hamrsky / Lesser diving beetles (Acilius sulcatus) mating pair, Europe, May, controlled conditions
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Jan Hamrsky / Lesser diving beetles (Acilius sulcatus) mating pair, Europe, May, controlled conditions
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Jan Hamrsky / Lesser diving beetles (Acilius sulcatus) mating pair, Europe, May, controlled conditions
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Jan Hamrsky / Lesser diving beetle (Acilius sulcatus) male, Europe, May, controlled conditions
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Jan Hamrsky / Lesser diving beetle (Acilius sulcatus) refilling its air supply by the surface, male, Europe, May, controlled conditions
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Jan Hamrsky / Great diving beetle larva (Dytiscus marginalis) head detail, Europe, June, controlled conditions
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Jan Hamrsky / Great diving beetle larva (Dytiscus marginalis) with dragonfly nymph prey, Europe, June, controlled conditions
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Jan Hamrsky / Great diving beetle larva (Dytiscus marginalis) with dragonfly nymph prey, Europe, June, controlled conditions
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Jan Hamrsky / Great diving beetle larva (Dytiscus marginalis) breathing by the water surface, Europe, June, controlled conditions
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David Pattyn / Little Grebe (Tachybaptus ruficollis) female feeding a Great diving beetle (Dytiscus marginalis) to one of its chicks age 10 days, The Netherlands, June.
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Jan Hamrsky / Great diving beetle (Dytiscus marginalis) female, Europe, September, controlled conditions
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Jan Hamrsky / Great diving beetle (Dytiscus marginalis) hiding in freshwater red algae (Batrachospermum moniliforme) Europe, September, controlled conditions
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Jan Hamrsky / Great diving beetle (Dytiscus marginalis) female, Europe, September, controlled conditions
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Jan Hamrsky / Great diving beetle (Dytiscus marginalis) hind oar-like leg detail, Europe, September, controlled conditions
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Jan Hamrsky / Great diving beetle (Dytiscus marginalis) refilling its air supply under the wing cases, Europe, September, controlled conditions
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Jan Hamrsky / Great diving beetle (Dytiscus marginalis) female, Europe, September, controlled conditions
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Jan Hamrsky / Great diving beetle (Dytiscus marginalis) refilling its air supply under the wing cases, Europe, September, controlled conditions
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Jan Hamrsky / Great diving beetle (Dytiscus marginalis) refilling its air supply under the wing cases, Europe, September, controlled conditions
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Jan Hamrsky / Great diving beetle larva (Dytiscus marginalis) feeding on tadpole, Europe, May, controlled conditions
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Jussi Murtosaari / Great diving beetle (Dytiscus) underwater, Finland, October
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Jussi Murtosaari / Great diving beetle (Dytiscus) underwater, Finland, October
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Will Watson / Great Diving Beetle (Dytiscus marginalis) female on Hornwort (Ceratophyllum demersum) UK, captive
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Paul Hobson / Great diving beetle (Dytiscus marginalis) Sheffield, UK
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Paul Hobson / Great diving beetle (Dytiscus marginalis) Sheffield, UK
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Will Watson / Great diving beetle (Dytiscus marginalis) larva eating a Three spined stickleback (Gasterosteus aculeatus), captive, Herefordshire, England, UK, June.
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Will Watson / Great diving beetle (Dytiscus marginalis) larva eating a Three spined stickleback (Gasterosteus aculeatus), captive, Herefordshire, England, UK, June.
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Will Watson / Great diving beetle (Dytiscus marginalis) larva eating a Three spined stickleback (Gasterosteus aculeatus), captive, Herefordshire, England, UK, June.
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Paul Hobson / Close-up of Great Diving Beetle (Dytiscus marginalis). Derbyshire, July.
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Paul Hobson / Great Diving Beetle (Dytiscus marginalis) at water surface. Derbyshire, June.
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MYN / Niall Benvie / Great diving beetle (Dytiscus marginalis) larva, with prey, Scotland, UK, June meetyourneighbours.net project
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MYN / Niall Benvie / Great diving beetle (Dytiscus marginalis) larva, with prey, Scotland, UK, June meetyourneighbours.net project
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Jan Hamrsky / Great Diving Beetle (Dytiscus marginalis) larva with open mouth parts. Europe, June.
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Jan Hamrsky / Great Diving Beetle (Dytiscus marginalis) at water surface. Europe, June.
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Jan Hamrsky / Great Diving Beetle (Dytiscus marginalis) larva with arthropod prey. Europe, June.
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Jan Hamrsky / Great Diving Beetle (Dytiscus marginalis) larva with arthropod prey. Europe, June.
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Jan Hamrsky / Great Diving Beetle (Dytiscus marginalis) larva with small fish prey. Europe, June.
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Will Watson / Male Great Diving Beetle (Dytiscus marginalis) on Soft Hornwort (Ceratophyllum submersum). Captive. Herefordshire, UK, August.
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Solvin Zankl / Black Piston water beetle (Hydrophilus aterrimus) [left] and Diving beetle (Dytiscus dimidiatus) [right] held in the hand, Europe
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Will Watson / Great Diving Beetle (Dytiscus marginalis) trying to couple with Great Diving Beetle (Dytiscus circumflexus) in an interspecies mating attempt, Herefordshire, UK.
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Will Watson / Great diving beetle (Dytiscus circumflexus) larva feeding on Common Frog (Rana temporaria) tadpole, captive, Herefordshire, UK.
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Will Watson / Great diving beetle (Dytiscus circumflexus) on Soft Hornwort (Ceratophyllum submersum) in pond, captive, UK.
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Will Watson / Male Great Diving Beetle (Dytyiscus marginalis) on Soft Hornwort (Ceratophllum submersum) in pond, Herefordshire, England, UK.
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Will Watson / Two female Great diving beetles (Dytiscus circumflexus) on Soft Hornwort (Certophyllum submersum) in pond, captive, Shropshire, UK.
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Will Watson / The underside of Great diving beetle (Dytiscus circumflexus) on Soft Hornwort (Ceratophyllum submersum) in pond, captive, UK.
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Will Watson / Great Diving beetle (Dytiscus circumflexus) on Soft Hornwort (Ceratophyllum submersum) in pond, captive, UK.
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Robert Thompson / Diving beetle (Dytiscus circumcintus) underwater, Montiaghs Moss NNR, County Antrim, Northern Ireland, UK
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Robert Thompson / Diving beetle (Dytiscus circumcintus) underwater, Montiaghs Moss NNR, County Antrim, Northern Ireland, UK
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Stephen Dalton / Great diving beetle (Dytiscus marginalis) feeding on worm prey, UK, controlled conditions
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Stephen Dalton / Great diving beetle (Dytiscus marginalis) male feeding on worm prey underwater, controlled conditions, UK
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Stephen Dalton / Great diving beetle (Dytiscus marginalis) pair underwater, controlled conditions, UK
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Stephen Dalton / Male Great diving beetle (Dytiscus marginalis) feeding on worm, UK
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Will Watson / The Wasp diving beetle (Dytiscus circmflexus) taking air, captive, England
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Will Watson / The Wasp diving beetle (Dytiscus circmflexus) captive, England
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Will Watson / The Wasp diving beetle (Dytiscus circumflexus) female resting on surface displaying wasp-coloured segments on the underside and longitudinal grooves on the wing case, captive, England.
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Will Watson / Male Great Diving Beetle (Dytiscus marginalis), resting on Hornwort (Ceratophyllun demersum), captive, UK.
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Solvin Zankl / Portrait of Great diving beetle (Dytiscus marginalis) larva with jaws, Germany
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S. Zankl / Larval Great diving beetle (Dytiscus marginalis) with juvenile newt prey in jaws, Germany
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S. Zankl / Great diving beetle (Dytiscus marginalis) larva crushing juvenile newt prey in jaws, Germany
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Willem Kolvoort / Great diving beetle larva (Dytiscus marginalis) sand-winning pit, Holland
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Willem Kolvoort / Great diving beetle male (Dytiscus marginalis) on Shining pondweed (Potamogeton Lucens), sand-winning Pit, Holland
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Willem Kolvoort / Great diving beetle male (Dytiscus marginalis) sand-winning Pit, Holland
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Willem Kolvoort / Great diving beetle (Dytiscus marginalis) underwater amongst pond weed, sand winning pit, Holland
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Willem Kolvoort / Great diving beetle larva (Dytiscus marginalis) sand-winning pit, Holland
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Willem Kolvoort / Great diving beetle larva (Dytiscus marginalis) eating Common frog tadpole (Rana temporaria) in sand winning pit, Holland
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Willem Kolvoort / Great diving beetle female profile (Dytiscus marginalis) sand-winning Pit, Holland
![Black Piston water beetle (Hydrophilus aterrimus) [left] and Diving beetle (Dytiscus dimidiatus) [right] held in the hand, Europe](http://nplimages.infradoxxs.com/cache/tcache/01323596.jpg "Black Piston water beetle (Hydrophilus aterrimus) [left] and Diving beetle (Dytiscus dimidiatus) [right] held in the hand, Europe")
