Ismaele Tortella / Four Eurasian elk (Alces alces) walking through vegetation , Norway, August

Ismaele Tortella / Tracking shot of a Whooper swan (Cygnus cygnus) family walking, Lofoten, northern Norway, August.

Morley Read / Lantern fly (Fulgora laternaria) walking along a branch in the rainforest, Orellana Province, Ecuador. (non-ex)

Morley Read / Millipede (Diplopoda) walking along a branch, Orellana Province, Ecuador. (non-ex)

Morley Read / Millipede (Diplopoda) walking along a branch, Orellana Province, Ecuador. (non-ex)

Morley Read / Slow motion clip of a Guacamayo plump toad (Osornophryne guacamayo) walking, Orellana Province, Ecuador. (non-ex)

Morley Read / Slow motion clip of a Leaf frog (Cruziohyla craspedopus) walking, Ecuador. (non-ex)

Morley Read / Slow motion clip of a Leaf frog (Cruziohyla craspedopus) turning around, Ecuador. (non-ex)

Danny Green / Polar bear (Ursus maritimus) walking across sea ice, reflected in water. Svalbard, Norway, July.

Danny Green / Polar bear (Ursus maritimus) female and cubs, one cub walking up slope of ice in foreground. Svalbard, Norway, July.

Danny Green / Polar bear (Ursus maritimus) walking across ice, snow covered mountain in background. Svalbard, Norway, April 2018.

Danny Green / Polar bear (Ursus maritimus) looking for food on ice. Svalbard, Norway, April.