Milan Radisics / Aerial shot of a confluence of three tributaries flowing over black sand at the mouth of the Affall River, Landeyjar area, Southern Iceland, August 2018.
Alex Mustard / Shoal of three Bigfin reef squid (Sepioteuthis lessoniana) in open water at night. Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.
Alex Mustard / Three Pink anemonefish (Amphiprion perideraion) living in a purple skirted magnificent sea anemone (Heteractis magnifica) on a coral reef, below a small island. Misool, Raja Ampat, West Papua, Indones...
David Woodfall / Lesser horseshoe bats (Rhinolophus hipposideros) in magnesium mine, Shropshire, England, UK, April.
David Woodfall / Little tern (Sterna albifrons) nest with three eggs in shingle ridge. County Wicklow, Ireland, June.
Staffan Widstrand / RF - Pied kingfisher (Ceryle rudis) group of three perched on branch, squabbling, Zimanga Private Nature Reserve, KwaZulu Natal, South Africa
Andy Rouse / Bengal tiger (Panthera tigris) male, sub-adult aged three years, face portrait. Ranthambhore National Park, India.
John Shaw / Chestnut-eared aracari (Pteroglossus castanotis) on cat-gut vine. Pantanal, Brazil, August.
SCOTLAND: The Big Picture / Red squirrel, (Sciurus vulgaris), three animals backlit on pine branch, Cairngorms National Park, Scotland, UK.May
Marie Read / Black skimmers (Rynchops niger), three in non-breeding plumage on beach, Fort De Soto Park, St. Petersburg, Florida, USA. January. Digitally altered to remove distractions.
Marie Read / Common loons (Gavia immer), two adults and chick swimming on a misty lake in early morning, Michigan, USA. June.
Marie Read / Wood Ducks (Aix sponsa), females behave aggressively toward a male (second from right) that is trying to join them on a floating log, autumn, New York, USA, October.
Shane Gross / Silky shark (Carcharhinus falciformis), three in Caribbean Sea off Gardens of the Queen National Park, Cuba.
Espen Bergersen / Aerial shot of a fishing boat catching Atlantic herring (Clupea harenguis), with Killer whales (Orcinus orca) and Humpback whales (Megaptera novaeangliae) swimming around the boats and large numbers o...
Espen Bergersen / Aerial shot of three Killer whales (Orcinus orca) swimming close to the surface, Troms, Norway, August.
Espen Bergersen / Aerial shot of Killer whales (Orcinus orca) near the surface, showing mating behaviour including a male Killer whale displaying penis, Troms, Norway, August.
Espen Bergersen / Aerial shot of Killer whales (Orcinus orca) near the surface, showing mating behaviour, Troms, Norway, August.
Espen Bergersen / Aerial shot of Humpback whales (Megaptera novaeangliae) lunge feeding in a shoal of Atlantic herring (Clupea harengus), Troms, Norway, January.