Alex Mustard / RF - High magnification photo of Secretary blenny (Acanthemblemaria maria) in boulder brain coral (Colpophyllia natans). East End, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea. (Th...

Danny Green / RF - Red fox (Vulpes vulpes) in dappled light on snow, Yellowstone National Park, USA, February 2016 (This image may be licensed either as rights managed or royalty free.)

Ernie Janes / RF- Lesser black-backed gulls (Larus fuscus) calling from shoreline, beaks open, England, UK, May. (This image may be licensed either as rights managed or royalty free.)

Alex Mustard / RF- Western clownfish (Amphiprion oceallaris) in Magnificent sea anemone (Heteractis magnifica). Raja Ampat, West Papua, Indonesia. (This image may be licensed either as rights managed or royalty free...

Alex Mustard / RF- Pair of Red Sea anemonefish (Amphiprion bicinctus) in Magnificent sea anemone (Heteractis magnifica), which has closed up in the late afternoon revealing its red skirt. St Johns Reef. Egypt. Red S...

Alex Mustard / RF- School of Scalefin anthias (Pseudanthias squamipinnis) on reef in the current feeding on plankton, with soft corals (Dendronephthya spp.) and fire coral (Millepora dichotoma) Jackson Reef, Strait...

Andy Trowbridge / RF- Arctic Fox (Alopex lagopus) curled up, resting, during moult from grey summer fur to winter white. Dovrefjell National Park, Norway, September. Dovrefjell National Park, Norway, September. (This i...

Andy Trowbridge / RF- Arctic Fox (Alopex / Vulpes lagopus) standing on ridge, during moult from grey summer fur to winter white. Dovrefjell National Park, Norway, September. (This image may be licensed either as rights...

Alex Mustard / RF- View through narrow Nes Canyon, near Husavik, north west Iceland. May 2011. Formed by a fault in Iceland's volcanic landscape filled with glacial spring water. (This image may be licensed either...

Andy Trowbridge / RF- Great Grey Owl (Strix nebulosa) adult and chicks on nest. Nest 'frame' is manmade. Ostersund, Sweden. June. (This image may be licensed either as rights managed or royalty free.)

Nick Garbutt / RF- Verreaux's sifaka lemur (Propithecus verreauxi) hanging from branch while feeding in canopy. Berenty Private Reserve, southern Madagascar. Endangered species. (This image may be licensed either a...

Nick Garbutt / RF- Young Ring-tailed lemurs (Lemur catta) carried on mother's back, Madagascar. (This image may be licensed either as rights managed or royalty free.)