Natalie Clements / Moorhen (Gallinula chloropus) adult preening chick on nest, south Wales, July.

Manuel Gracia / Whiskered tern (chilidonias hybrida) adult flies into frame with dead frog (Anura sp.), prey is passed to other adult which is then fed to one of the begging chicks on the nest, one of the adult leave...

Manuel Gracia / Two-tailed pasha (Charaxes jasius) caterpillar metamorphosis - changing from caterpillar to chrysalis, Seville, Spain, November. Speed Ramped (Not Timelapse). Studio.

Manuel Gracia / Booted eagle (Hieraaetus pennatus) cleaning its beak on a branch, Seville, Spain, March.

Ashish & Shanthi Chandola / Eurasian tree sparrow (Passer montanus) perched, holding nesting materials in beak before flying off and leaving frame, outskirts of Keibul Lamjao National Park, Manipur, India, April.

Harry Collins / Cheetah (Acinonyx jubatus) female leaving mound with two cubs following, one cub tries to play with mother, Masai Mara, Africa, November.

Harry Collins / Elk (Cervus canadensis) male bugling with steaming breath on a cold morning, Banff National Park, Canada, September.

Harry Collins / Elk (Cervus canadensis) male emerging from Athabasca river with water dripping from fur and bugling, Jasper National Park, Canada, September.

Mateusz Piesiak / European penduline tit (Remiz pendulinus) building its nest in slow motion, Lower Silesia, Poland, May.

Mateusz Piesiak / European penduline tit (Remiz pendulinus) building its nest in slow motion, Lower Silesia, Poland, May.

Simon Littlejohn / Red deer (Cervus elaphus) stag standing in bracken (Pteridium) bellowing with morning mist moving past and another stag in background, Bushy Park, Surrey, UK, October.

Simon Littlejohn / Red deer (Cervus elaphus) stag standing in bracken (Pteridium) bellowing with morning mist moving past, Bushy Park, Surrey, UK, October.