Dave Bevan / Eastern grey squirrel (Sciurus, Carolinensis) entering top of a bird feeder, struggling to get out again, Carmarthenshire, Wales, UK, June.

Andy Rouse / 2020VISION / Wild boar (Sus scrofa) piglet in woodland undergrowth, Forest of Dean, Gloucestershire, UK, March. Photographer quote: "Getting down and dirty with this wild boar piglet meant that I had to eat the fo...

Diane McAllister / The snow at Horsetail Falls' begins to melt in mid-February, enabling the falls to resume once again. The clear sky and low sun angle ignite the rock wall during sundown. Yosemite National Park, Calif...

Mark Bowler / Sustainable river fishing for Silver Arowana / Arahuana (Osteoglossum bicirrhosum) for the tropical fish trade - baby Arowana fish fry are harvested from the adult male (this species is a mouth broode...

Espen Bergersen / Aerial shot of a Humpback whale (Megaptera novaeangliae) surfacing to breathe, before diving again, Troms, Norway, November.

Juergen Freund / Timelapse looking towards Walsh Pyramid from day to night and then day again with clouds forming over rainforest, Wet Tropics World Heritage Area, North Queensland, Australia. 2017.

David Fleetham / Halemaumau Crater in Volcanoes National Park on The Big Island, Hawaii. The volcano became active again in 2011, having since been dormant from 1967.

Alex Mustard / Pair of Yellowbelly hamlets (Hypoplectrus aberrans) spawning at dusk. Hamlets are one of the few vertebrate species that are true hermaphrodites, here the fish with the open mouth is acting as a male...

Alex Mustard / Pair of Barred hamlets (Hypoplectrus puella) spawning at dusk . Hamlets are one of the few vertebrate species that are true hermaphrodites, here the fish in the foreground is acting as a male, but thi...

Frederique Olivier / Emperor penguin (Aptenodytes forsteri) chick jumps into a tide crack, struggling to get out again, Adelie Land, Antarctica, January.

Philippe Clement / European polecat (Mustela putorius) dragging bedding material from nest and pulling it back in again, Isselburg, Germany, October. Captive.

Philippe Clement / European polecat (Mustela putorius) dragging bedding material from nest and pulling it back in again, Isselburg, Germany, October. Captive.