Ingo Arndt / Aerial shot over a forest of Southern beech trees (Nothofagus) in autumn, Torres del Paine National Park, Patagonia, Chile, April, 2018.

Duncan Murrell / Silver beech / tawhai (Lophozonia menziesii) cloud forest on the Manuoha Track, Te Urewera National Park, North Island, New Zealand.

Duncan Murrell / Silver beech / tawhai (Lophozonia menziesii) cloud forest on the Manuoha Track, Te Urewera National Park, North Island, New Zealand.

Duncan Murrell / Red beech forest / Tawhairaunui (Nothofagus fusca),Te Urewera National Park, North Island, New Zealand.

Duncan Murrell / Silver beech / tawhai (Lophozonia / Nothofagus menziesii) cloud forest on the Manuoha Track, Te Urewera National Park, North Island, New Zealand.

Duncan Murrell / Red beech forest / Rawhairaunui (Nothofagus fusca),Te Urewera National Park, North Island, New Zealand.

Jack Dykinga / Autumnal Lenga trees (Nothofagus pumilio), on the flanks of Torres del Paine, with new snow from fast moving storm. Torres del Paine, Patagonia, Chile.

Andy Trowbridge / Silver beech (Lophozonia / Nothofagus menzeseii) in mist. Arawhata River, West Coast, South Island, New Zealand. January.

Andy Trowbridge / Silver beech (Lophozonia / Nothofagus menzeseii) in mist. Arawhata River, West Coast, South Island, New Zealand. January.

Floris van Breugel / Snow covered Lenga trees (Nothofagus pumilio) after large storm, El Chalten, Argentina, June 2014.

Jiri Lochman / Subtropical rainforest with Antarctic Beeches (Nothofagus moorei), Barrington Tops National Park, Gondwana Rainforest UNESCO World Hertiage Site, New South Wales, Australia.

Chris Mattison / Lenga (Nothofagus pumilio) Torres del Paine National Park, Chile.

Ole Jorgen Liodden / Ivory gull (Pagophila eburnea) behind Polar bear (Ursus maritimus) framed by its legs, Svalbard, Norway, July.

Ole Jorgen Liodden / Ivory gull (Pagophila eburnea) behind Polar bear (Ursus maritimus), Svalbard, Norway, July.

Tony Heald / Ivory gull (Pagophila eburnea) Svalbard, Norway, July.

Ole Jorgen Liodden / Polar bear (Ursus maritimus) feeding on seal with Ivory gulls (Pagophila eburnea) standing by, Svalbard, Norway September

Ole Jorgen Liodden / Ivory Gull (Pagophila eburnea) in flight, Svalbard, Norway September

Oriol Alamany / Ivory gull (Pagophila eburnea) resting on sea ice in the Arctic Ocean, Svalbard Islands, Norway, July

Oriol Alamany / Ivory gull (Pagophila eburnea) resting on sea ice in the Arctic Ocean, Svalbard Islands, Norway, July

Oriol Alamany / Ivory gull (Pagophila eburnea) rflying from sea ice in the Arctic Ocean, Svalbard Islands, Norway, July

Staffan Widstrand / Two Ivory gulls (Pagophila eburnea) standing on snow, one of them is cleaning itself, Svalbard, Norway, Arctic, September

Ole Jorgen Liodden / Two Ivory gulls (Pagophila eburnea) on ice, Storfjorden, Svalbard, Norway, June.

Ole Jorgen Liodden / Ivory gull (Pagophila eburnea) drinking with reflection in water, Svalbard, Norway, July.

Ole Jorgen Liodden / Ivory gull (Pagophila eburnea) drinking with reflection in water, Svalbard, Norway, July.