Steven David Miller / Red-collared lorikeet (Trichoglossus rubritorquis) pair examining hole in Eucalyptus as a potential nesting hollow. Katherine, Northern Territory, Australia.

Wim van den Heever / African lion (Panthera leo) growling at potential danger in the water (Panthera leo) Okavango Delta, Botswana.

Paul D Stewart / Aerial view of Grand Prismatic thermal spring in Yellowstone National Park, USA. The bright colours are natural, coming from thermophile bacteria in the water. People can be seen walking on the raised...

Kathryn Jeffs / Southern Type B Killer whale (Orcinus orca) spyhops to see if Crabeater seals (Lobodon carcinophagus) are potential prey, Antarctica. Taken on location for BBC Frozen Planet series, January 2009

Peter Cairns / 2020VISION / Grey seal (Halichoerus grypus) bull with reflections on water of harbour lights, Shetland Isles, Scotland, UK, June 2010. Photographer quote: 'This 'seal on fire' is actually bobbing in a harbour and...

Sergey Gorshkov / Salmon (Salmonidae) eggs falling to lake bottom, Lake Kuril, Kamchatka, Far East Russia, July

Konrad Wothe / European Bee-eater (Merops apiaster) presents prey item to potential mate, Bulgaria

Kim Taylor / Wood Ant (Formica rufa) workers on top of their nest synchronise ejection of formic acid droplets to maximise deterrent effect on potential predator, UK. Commended in the Audubon Society of Greater De...

Andrew Parkinson / Sika deer (Cervus nippon) female stretching her head back to detect the scent of any potential threat. Arne RSPB Reserve, Dorset, UK, October (non-ex)

Doug Gimesy / A platypus (Ornithorhynchus anatinus) has a radio transponder surgically implanted by Dr Gilad Bino whilst anaesthetised in a make-shift surgical theatre in a lounge. This transponder will allow resea...

Doug Gimesy / A platypus (Ornithorhynchus anatinus) has a radio transponder surgically implanted by Dr Gilad Bino whilst anaesthetised in a make-shift surgical theatre in a lounge. This transponder will allow resea...

Doug Gimesy / Volunteer field assistant recording data from an anaesthetised platypus (Ornithorhynchus anatinus) as it starts to recover from the anesthetic. It was anaesthetised so a temporary radio transponder co...