Stefan Christmann / Emperor penguin (Aptenodytes forsteri) group clambering up slope during journey to bring back food for young. Atka Bay, Antarctica. September.

Suzi Eszterhas / Ring tailed lemurs (Lemur catta) feeding on Spiny forest tree (Didierea trollii).Berenty Private Reserve, Madagascar

Anup Shah / Eastern White-bearded Wildebeest (Connochaetes taurinus) herd crossing the Mara River and clambering up steep bank. Masai Mara National Reserve, Kenya, July

Eric Baccega / Eastern White-bearded Wildebeest (Connochaetes taurinus) herd crossing the Mara River and clambering up steep bank. Masai Mara National Reserve, Kenya.

Cyril Ruoso / Ringed-tailed lemur (Lemur catta) female with baby clambering across steep rockface. Anja Community Reserve, Madagascar.

Edwin Giesbers / Lemon-yellow tree frog (Hyla savignyi) on grass stem. Cyprus. April.

Stefan Christmann / Emperor penguin (Aptenodytes forsteri) group clambering up slope during journey to bring back food for young. Atka Bay, Antarctica. September.

Loic Poidevin / Golden jackal (Canis aureus) climbing tree trunk to scavenge fish left by Sea eagle. Hooded crow (Corvus cornix) perched at top. Danube Delta, Romania, May.

Alex Mustard / Sponge brittle star (Ophiactis sp) clambering over a Red boring sponge (Cliona delitrix) covered in Sponge zoanthids (Parazoanthus parasiticus) East End, Grand Cayman, Cayman Islands, British West Ind...

Nick Garbutt / Ring-tailed Lemur (Lemur catta) clambering over rocks. Isalo National Park, southern Madagascar.

Anup Shah / Nile crocodiles {Crocodylus niloticus} clambering over each other during dry season, Katavi NP, Tanzania

Nick Garbutt / Marbled Tree Toad {Pedostipes rugosus} clambering amonst debris on forest floor, Lowland rainforest, Danum Valley, Sabah, Borneo.