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

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

Jeff Foott / Jeffrey Pine (Pinus jeffreyi), Incense Cedar (Calocedrus decurrens) and ferns, Yosemite National Park, California

Jack Dykinga / Western sword fern (Polystichum munitum) and Big leaf maple (Acer macrophyllum) trees that are covered with moss, Hoh Temperate Rainforest, Olympic National Park, Washington, USA. June 2017.

Tui De Roy / Atlantic yellow-nosed albatross (Thalassarche chlororhynchos). nesting amid Blechnum palmiforme tree ferns. Gough Island, Gough and Inaccessible Islands UNESCO World Heritage Site, South Atlantic.

Ingo Arndt / Bald Cypress (Taxodium distichum) trees in swamp with epiphytes and ferns, Everglades National Park, Florida

Ingo Arndt / Bald Cypress (Taxodium distichum) trees in swamp with epiphytes and ferns, Everglades National Park, Florida

Juan Carlos Munoz / Ferns growing near fallen tree in Chestnut forest, Onati, Gipuzkoa, Basque Country, Spain, Europe

Mark MacEwen / Snares island crested penguin (Eudyptes robustus) in forest, Snares Island, New Zealand.

Luciano Candisani / Treefrog (Dendropsophus elegans) on fern, Atlantic Forest, Brazil

Tim Laman / Rock outcrops among tree fern forest at 3300 m elevation. Jayawijaya Mountains, New Guinea. June 2010

Alan Watson / Frond pattern of tree ferns (Cyathea arborea) in lowland tropical rainforest at 420 metres, Loma Quita Espuela Scientific Reserve, Dominican Republic.

Alan Watson / Frond pattern of tree ferns (Cyathea arborea) in lowland tropical rainforest at 420 metres, Loma Quita Espuela Scientific Reserve, Dominican Republic.

Jack Dykinga / Pink flowers fallen from Marlberry tree (Ardisia sp) in the forest canopy above onto dense carpet of ferns, El triunfo Biosphere Reserve, Chaipas, Mexico

Juergen Freund / Millaa Millaa Waterfall amongst tropical rainforest with Tree fern, Queensland, Australia

Dave Watts / Eastern Quoll {Dasyurus viverrinus} on log, dark phase, Tasmania, Australia.

Claus Meyer / Tree Frog (Hyla sp) balanced on fern fiddlehead, Atlantic Forest, Brazil

Georgette Douwma / Tree fern or Palm coral {Clavularia sp} Papua New Guinea

Morley Read / Slow motion clip of a Linda's torrenteer frog (Hyloscirtus lindae) jumping from a tree fern leaf, Orellana Province Ecuador. (non-ex)

Morley Read / Slow motion clip of a Linda's torrenteer frog (Hyloscirtus lindae) jumping from a tree fern leaf, Orellana Province Ecuador. (non-ex)

Morley Read / Slow motion clip of a Linda's torrenteer frog (Hyloscirtus lindae) jumping from a tree fern leaf, Orellana Province Ecuador. (non-ex)

John Shaw / Sword ferns (Polystichum munitum) in a red alder (Alnus rubra) grove. Hoh Rainforest, Olympic National Park, Washington, USA, June.

John Shaw / Sword ferns (Polystichum munitum) in a red alder (Alnus rubra) grove. Hoh Rainforest, Olympic National Park, Washington, USA, June.

John Shaw / Moss-covered Sitka spruce (Picea sitchensis) and sword fern (Polystichum munitum) in the Hoh Rain Forest, Olympic National Park, Washington, USA, June.

John Shaw / Moss-covered Sitka spruce (Picea sitchensis) and sword fern (Polystichum munitum) in the Hoh Rain Forest, Olympic National Park, Washington, USA, June.

John Shaw / Moss-covered Sitka spruce (Picea sitchensis) and sword fern (Polystichum munitum) in the Hoh Rain Forest, Olympic National Park, Washington, USA, June.

John Shaw / Moss-covered Sitka spruce (Picea sitchensis) and sword fern (Polystichum munitum) in the Hoh Rain Forest, Olympic National Park, Washington, USA, June.

John Shaw / Moss-covered Sitka spruce (Picea sitchensis) and sword fern (Polystichum munitum) in the Hoh Rain Forest, Olympic National Park, Washington, USA, June.

John Shaw / Moss-covered Sitka spruce (Picea sitchensis) and sword fern (Polystichum munitum) in the Hoh Rain Forest, Olympic National Park, Washington, USA, June.

John Shaw / Moss-covered Sitka spruce (Picea sitchensis) and sword fern (Polystichum munitum) in the Hoh Rain Forest, Olympic National Park, Washington, USA, June.

John Shaw / Moss-covered Sitka spruce (Picea sitchensis) and sword fern (Polystichum munitum) in the Hoh Rain Forest, Olympic National Park, Washington, USA, June.

Juan Manuel Borrero / Laurisilva forest. Natural Monument of Caldeira Velha, Ribeira Grande, Sao Miguel Island, Azores, Portugal.

Juan Manuel Borrero / Tree ferns (Cyatheales) in humid forest. Natural Monument of Caldeira Velha, Ribeira Grande, Sao Miguel Island, Azores, Portugal.

Juan Manuel Borrero / Tree ferns (Cyatheales) in humid laurisilva forest. Natural Monument of Caldeira Velha, Ribeira Grande, Sao Miguel Island, Azores, Portugal.

Juan Manuel Borrero / Ferns in front of Japanese cedar (Cryptomeria japonica) forest. Natural Monument of Caldeira Velha, Ribeira Grande, Sao Miguel Island, Azores, Portugal.

Juan Manuel Borrero / Ferns in front of Japanese cedar (Cryptomeria japonica) forest. Natural Monument of Caldeira Velha, Ribeira Grande, Sao Miguel Island, Azores, Portugal.

Juan Manuel Borrero / Tree ferns (Cyatheales) in laurisilva forest. Natural Monument of Caldeira Velha, Ribeira Grande, Sao Miguel Island, Azores, Portugal.

Tim Laman / Ferns along a rain forest stream. Batang Toru Forest, Sumatran Orangutan Conservation Project, North Sumatran Province, Indonesia.

Duncan Murrell / Tree ferns on the Mangamate Track in Whirinaki Forest Park, North Island, New Zealand.

Duncan Murrell / Tree ferns on the Mangamate Track in Whirinaki Forest Park, North Island, New Zealand.

Duncan Murrell / Tree ferns on the Mangamate Track in Whirinaki Forest Park, North Island, New Zealand.

Duncan Murrell / Tree ferns in Whirinaki Forest Park, North Island, New Zealand.

Duncan Murrell / Tree ferns in Whirinaki Forest Park, North Island, New Zealand.

Duncan Murrell / Tree ferns, Lake Waikaremoana, Te Urewera National Park, North Island, New Zealand.

SCOTLAND: The Big Picture / Bracken (Pteridium aquilinum) in Birch woodland (Betula pendula) in late autumn, Scotland, UK, October.

Steven David Miller / A male Australian King parrot (Alisterus scapularis) standing in a tree fern, Cania Gorge National Park, Queensland, Australia.

David Pattyn / Old trees covered with ferns, orchids and bromeliads in typical high altitude rainforest, Bellavista private reserve, Mindo cloud forest area, Ecuador, July

David Pattyn / Fern covered trees with orchids and bromeliads, Bellavista private reserve, Mindo cloud forest area, Pichincha, Ecuador , July

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

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

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

Nick Hawkins / Tree ferns and rainforest. Cocos Island National Park, Costa Rica.

Thomas Marent / Tree fern in rainforest, Putumayo, Colombia

Thomas Marent / Tree fern in rainforest, Putumayo, Colombia

Bruno D'Amicis / Fern (Pteridium aquilinum) in old-growth Beech (Fagus sylvatica) forest. Abruzzo, Lazio and Molise National Park / Parco Nazionale d'Abruzzo, Lazio e Molise UNESCO World Heritage Site Italy. Octob...

Guy Edwardes / View over New Forest lowland heathland from Vereley Hill at dawn, Burley, New Forest National Park, Hampshire, England, UK. August 2011

Jack Dykinga / Hoh Rain Forest with moss covered Sitka spruce (Picea sitchenis) trees in morning fog. Olympic National Park, Washington, USA, June.

Jack Dykinga / Big leaf maple (Acer macrophyllum) draped in moss and surrounded by lush forest understory of sword ferns (Polystichum munitum) Prairie Creek Redwoods State and National Park, California.

Jack Dykinga / Canadian dogwood (Cornus canadensis) flowers brighten the fern covered forest floor. Olympic National Park, Washington, USA, June.

Jack Dykinga / Canadian dogwood (Cornus canadensis) flowers brighten the fern covered forest floor. Olympic National Park, Washington, USA, June.

Staffan Widstrand / Wild Wonders of China / Staghorn ferns (Platycerium) on rainforest trees, Tongbiguan Nature Reserve, Dehong Prefecture, Yunnan Province, China. April

Staffan Widstrand / Wild Wonders of China / Giant ferns, in rainforest in the Tongbiguan Nature Reserve, Dehong Prefecture, Yunnan Province, China, April.

Staffan Widstrand / Wild Wonders of China / Staghorn ferns (Platycerium) on rainforest trees, Tongbiguan Nature Reserve, Dehong Prefecture, Yunnan Province, China, April.

Staffan Widstrand / Wild Wonders of China / Tree ferns (Cyatheales) and other trees and vegetation in the montane rainforest, Tongbiguan Nature Reserve, Dehong Prefecture, Yunnan province, China, May.

Staffan Widstrand / Wild Wonders of China / Tree ferns, Cyatheales, and other trees and vegetation in the montane rainforest, Tongbiguan Nature Reserve, Dehong Prefecture, Yunnan province, China. May

Staffan Widstrand / Wild Wonders of China / Tree ferns (Cyatheales) in the montane rainforest, Tongbiguan Nature Reserve, Dehong prefecture, Yunnan province, China, May.

Staffan Widstrand / Wild Wonders of China / Staghorn ferns on rainforest trees, Tongbiguan Nature Reserve, Dehong Prefecture, Yunnan Province, China, April.

Ashley Cooper / The South West Coast path in a wooded section of the undercliff, between Seaton and Lyme Regis. Jurassic Coast UNESCO World Heritage Site, Dorset, England. UK, June.

Ashley Cooper / Epiphytic ferns on tree in the Daintree rainforest, North Queensland, Australia, the oldest continuously forested rainforest area on the planet.

Ashley Cooper / The Curtain Fig Tree, a massive Green fig tree (Ficus virens) in the Daintree Rainforest on the Atherton Tablelands, Queensland, Australia.

Ashley Cooper / The Curtain Fig Tree, a massive Green fig tree (Ficus virens) in the Daintree Rainforest on the Atherton Tablelands, Queensland, Australia.

Ashley Cooper / The Curtain Fig Tree, a massive Green fig tree (Ficus virens) in the Daintree Rainforest on the Atherton Tablelands, Queensland, Australia.

Ashley Cooper / Road running through the forest canopy of the Daintree rainforest in northern Queensland, Australia, February 2010.

Ashley Cooper / Forest canopy of the Daintree rainforest in northern Queensland, Australia, February 2010.

Ashley Cooper / Forest canopy of the Daintree rainforest in northern Queensland, Australia. February 2010.

Ashley Cooper / The Cathedral Fig Tree, a massive Green fig tree (Ficus virens) in the Daintree Rainforest on the Atherton Tablelands, Queensland, Australia. February.

Ashley Cooper / The Curtain Fig Tree, a massive Green fig tree (Ficus virens) in the Daintree Rainforest on the Atherton Tablelands, Queensland, Australia.

Ashley Cooper / Rotting tree stump in Daintree rainforest, northern Queensland, Australia, the oldest continuously forested rainforest area on the planet.

Joao Burini / Cyathea fern surrounded by various palm species, Carlos Botelho State Park, Sao Paulo, Atlantic Forest South-East Reserves, UNESCO World Heritage Site, Brazil.

Kirkendall-Spring / Ferns and moss covered trees in the Hoh Rain Forest of Olympic National Park. Washington, USA. September.

Kirkendall-Spring / Queets Rain Forest in Olympic National Park. Washington, USA. September.

Kirkendall-Spring / Ferns and moss covered trees in the Hoh Rain Forest of Olympic National Park. Washington, USA.

Adrian Davies / Tree fern (Cyathea princeps) frond unfurling, cultivated specimen, occurs in Mexico / Central America.

Chien Lee / Orchid (Pedilochilus perpusillum) flowers on tree fern trunk, Snow Mountains, Papua, Indonesia

Kirkendall-Spring / Hawaii tree fern / Hapu'u (Cibotium glaucum) frond unfurling, Hawaii Volcanoes National Park, Hawaii. December 2016.

Vincent Grafhorst / Ferns on branch, Harenna Forest, Bale Mountains National Park, Ethiopia

Staffan Widstrand / Tree fern (Cyatheales sp) silhouetted in montane rainforest, near FakFak, Mainland New Guinea, Western Papua, Indonesian New Guinea

Michael Hutchinson / Panning shot from fern growing on fallen tree trunk to Common bluebells (Hyacinthoides non-scripta) flowering in woodland, Prior's Wood Avon Wildlife Trust Reseve, Bristol, England, UK, May.

Philippe Clement / Soft tree ferns / Man ferns (Dicksonia antarctica) evergreen tree fern native to eastern Australia

Philippe Clement / Soft tree ferns / Man ferns (Dicksonia antarctica) evergreen tree fern native to eastern Australia

Staffan Widstrand / Wild Wonders of China / Autumn leaves on moss covered tree with fern epiphyte. humid montane mixed forest, Laba He National Nature Reserve, Sichuan, China

Jack Dykinga / Bracken ferns and Sorrel growing on a felled Redwood tree, Redwood National Park, Prairie Creek, California, USA. June 2017.

Jack Dykinga / Western sword fern (Polystichum munitum) and Big leaf maple (Acer macrophyllum) trees that are covered with moss, Hoh Temperate Rainforest, Olympic National Park, Washington, USA. June 2017.

Jack Dykinga / Western sword fern (Polystichum munitum) and Big leaf maple (Acer macrophyllum) trees that are covered with moss, Hoh Temperate Rainforest, Olympic National Park, Washington, USA. June 2017.

Jack Dykinga / Western sword fern (Polystichum munitum) and Big leaf maple (Acer macrophyllum) trees that are covered with moss, Hoh Temperate Rainforest, Olympic National Park, Washington, USA. June 2017.

Jack Dykinga / Bracken ferns and Sorrel growing on a felled Redwood tree, Redwood National Park, Prairie Creek, California, USA. May 2017.