Terry Whittaker / Man being lowered down a cliff to collect seabird eggs, including those of Common guillemots (Uria aalge). Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland, May.

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

Morley Read / Timelapse of climbers making their way up to the summit of Cotopaxi Volcano (5897m) after a heavy snowfall, Cotopaxi, Ecuador, December 2018. (non-ex)

Suzi Eszterhas / Cotton-top tamarin (Saguinus oedipus), three climbing tree. Northern Colombia.

David Pattyn / Tayra (Eira barbara) climbing in a tree in rainforest habitat with fern covered trees, Bellavista private reserve, Mindo cloud forest area, Ecuador, July

Lorraine Bennery / Blue-eyed lemur (Eulemur flavifrons) female in tree. Sahamalaza, Madagascar.

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

Nick Upton / European eel (Anguilla anguilla) elver migrating upstream, using an eel pass on the side of a weir, Somerset Levels, England, UK, July.

Tim Laman / Tapanuli Orangutan (Pongo tapanuliensis). Togus, adult flanged male Batang Toru Forest Sumatran Orangutan Conservation Project North Sumatran Province Indonesia

Tim Laman / Tapanuli Orangutan (Pongo tapanuliensis) Beti, juvenile female, daughter of Beta, in the trees, Batang Toru Forest, Sumatran Orangutan Conservation Project, North Sumatran Province, Indonesia

Dave Bevan / Harvest mouse (Micromys minutus) climbing on corn stalks, UK, July. Captive.

Dave Bevan / Harvest mouse (Micromys minutus) climbing a Thistle (Cirsium), UK, July. Captive.