Ingo Arndt / Fishing spider {Ancylometes bogotensis} on water surface, French Guyana

Chris & Monique Fallows / King penguin (Aptenodytes patagonicus) colony with storm approaching. Grytviken, South Georgia Island.

Kim Taylor / Raft spider (Dolomedes fimbriatus) male resting on water surface, Surrey, UK

Andy Sands / Long Water Measurer (Hydrometra stagnorum) drinking by piercing surface tension with mouthparts. Captive, UK, July.

Ingo Arndt / Pond Skater (Gerris sp) using surface tension to walk on water, a true bug of the Heteroptera suborder, Europe

Dietmar Nill / Raft spider (Dolmedes fimbriatus) on water. Germany, Europe

Nick Upton / Common pond skater (Gerris lacustris) standing on the surface of a garden pond before skating off at speed, with many colonial Green algae (Volvox) spheres moving below the surface, Wiltshire, England...

Nick Garbutt / Raft spider (Dolomedes fimbriatus) resting on water's surface. Nordtirol, Tirol, Austian Alps, Austria. July.

Alex Hyde / Raft Spider (Dolomedes fimbriatus) female resting on the surface of a moorland pool among stems of Horsetail (Equisetum sp.). Nordtirol, Austrian Alps, June.

Alex Hyde / Raft Spider (Dolomedes fimbriatus) female resting on the surface of a moorland pool, photographed with a fisheye lens to show surrounding habitat. Nordtirol, Austrian Alps, June.

Mike Potts / Buckle Island, Balleny Islands, Antarctica, February.

Ammonite / Pair of Red-eyed damselflies (Erythromma najas) in tandem pulled underwater by surface tension whilst laying eggs beneath the surface of a pond, Hickling Broad NWT reserve, Norfolk, England, UK, June.

Thomas Marent / Fishing Spider (Dolomedes sp)walking on water over Common Frog (Rana temporaria) spawn, Switzerland

Marie Read / Wilson's Phalarope (Phalaropus tricolor), female feeding by using surface tension of water to pick up small prey item, probably brine shrimp (Artemia monica), while swimming, Mono Lake, California, US...

Andy Sands / Long Water Measurer (Hydrometra stagnorum) walking on water using surface tension. Captive, UK, July.

Nick Upton / Pond Skater (Gerris lacustris) standing on water at edge of stream. Wiltshire, UK, April.

Ingo Arndt / Pond Skater (Gerris sp) using surface tension to walk on water, a true bug of the Heteroptera suborder, Europe

Kim Taylor / Pond Skater (Gerris lacustris) on the surface of a still pond. Surrey, UK

Kim Taylor / Mosquito (Culiseta / Theobaldia annulata) male imago freshly emerged. UK

Doug Wechsler / Spider (Dolomedes sp.) fishing on water surface. Blackbird State Forest, Delaware, USA

Phil Savoie / Speckled dun mayfly (Callibaetis ferrugineus) newly hatched mayfly struggling in water tension, possible prey for trout. Montana, USA, May.

Phil Savoie / Speckled dun mayfly (Callibaetis ferrugineus) newly hatched mayfly struggling in water tension, possible prey for trout. Montana, USA, May.

Jussi Murtosaari / White-throated dipper (Cinclus cinclus) looking for food beneath surface of river, Finland, February.

Lorraine Bennery / Pondskater (Gerris lacustris) on the surface of a pond, Arandon, France.

Alex Hyde / Raft Spiders (Dolomedes fimbriatus) on surface of moorland pool. Highlands, Scotland, October.

Andres M. Dominguez / Pond skaters group on water surface in pond, Los Alcornocales Natural Park, Andalusia, southern Spain. October

Sven Zacek / Common pond skaters (Gerris lacustris) on Altja river, Lahemaa National Park, Northern Estonia.

Konrad Wothe / Pond skater (Gerris sp.) on water surface, Germany

Konrad Wothe / Raft Spider (Dolomedes fimbriatus) withfemale Small Red-eyed Damselfly (Erythromma viridulum) prey on water surface, Upper Bavaria, Germany, May.

Philippe Clement / High-voltage electricity pylon / transmission tower and steam / vapour coming from cooling tower of nuclear power station / nuclear power plant, Belgium. December 2018

Philippe Clement / High-voltage electricity pylon / transmission tower and steam / vapour coming from cooling tower of nuclear power station / nuclear power plant, Belgium. December 2018