Guy Edwardes / Waterfall in Fjaorargljufur canyon, Kirkjubaejarklaustur, Iceland, August 2017.

Guy Edwardes / Cauldron Force, West Burton, Yorkshire Dales National Park, North Yorkshire, England, UK, June.

Christophe Courteau / Mountain gorilla (Gorilla beringei beringei), silverback and juvenile son. Volcanoes National Park. Rwanda.

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.

Alex Hyde / Lowland tropical rainforest understory vegetation dominated by (Cyclanthaceae) plants, Osa Peninsula, Costa Rica

Juan Carlos Munoz / Aerial view of Delta Sierpe River Terraba, Corcovado National Park, Osa Peninsula, Puntarenas Province, Costa Rica. December 2014.

Dong Lei / Vegetation and mist over Kawakarpo Mountain, Meri Snow Mountain National Park, Yunnan Province, China.

Jack Dykinga / Sun shining through mesquite bosque forest with lush winter rain-fed grasses covering the forest floor at sunset, Catalina State Park, Arizona. February 2014.

Sandra Bartocha / Scots pine (Pinus sylvestris) forest in spring, Muritz-National Park, Germany, May.

Floris van Breugel / Syncronous Fireflies (Photinus carolinus) illuminate the lush forests of Smoky Mountains National Park, Tennesse, USA, July

Enrique Lopez-Tapia / Tropical forest at lower level slopes of Mount Kilimanjaro volcano, Tanzania

Luiz Claudio Marigo / Jequitiba rosa tree (Cariniana legalis) Tableland Atlantic Rainforest of Vale Natural Reserve, municipality of Linhares, Esparito Santo State, Eastern Brazil, January 2012.

Luis Quinta / Waterfall in Laurisilva Forest, Madeira Island, April 2009.

Brandon Cole / Scuba diver swimming over Common Sea Fans (Gorgonia ventalina) on lush coral reef in the Florida Keys National Marine Sanctuary. Florida, USA, Atlantic Ocean, July. Model released.

Jouan & Rius / Palm trees (Licuala valida) in swamp forest, Lambir NP, Borneo, Sarawak, Malaysia

Jouan & Rius / View up through Palm trees in swamp forest, Borneo, Sarawak, Malaysia

Tim Laman / A waterfall in the lowland rainforest of Borneo, with pool surrounded by ferns and other plants. Lambir Hills National Park, Sarawak, Malaysia.

Tim Laman / A waterfall in the lowland rainforest of Borneo, with pool surrounded by ferns and other plants. Lambir Hills National Park, Sarawak, Malaysia.

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.

Niall Benvie / Stream running through natural old Hazel (Corylus avellana) woodland, near Golspie, Sutherland, Scotland, UK, May 2009

Neil Lucas / Strangler fig tree (Ficus sp) in Danham Valley, Sabah, Borneo, September 2008

Mark Bowler / Tropical rainforest habitat near the Yavari river, Peru

Juergen Freund / Fern Pool - a permanent swimming hole surrounded by lush vegetation, Karajini National Park, Western Australia

Christophe Courteau / Aerial view of Okavango Delta, Botswana, Southern-Africa. End of rainy season, April.

David Noton / Vertical panoramic through Tropical rainforest, Khao Sok, Thailand

David Noton / Panoramic of tropical rainforest interior, Khao Sok, Thailand, South East Asia

David Noton / Panoramic view of tree buttress roots in tropical rainforest, Daintree, Queensland, Australia

Staffan Widstrand / Interior of Cloudforest / mountain forest, Manu NP Peru.

Staffan Widstrand / Interior of tropical rainforest understorey, Aguarico, Ecuador. South America

Norbert Wu / Giant Kelp (Macrocystis pyrifera) forms dark, lush canopy forest in cold waters, southern California

Theo Allofs / Mokau Falls in rainforest, Te Urewera National Park, New Zealand

Christian Ziegler / Rainforest, Rwenzori Mountains, Uganda

Konrad Wothe / Creek with suspension bridge in rainforest, Baeza, northern Ecuador

Vincent Grafhorst / Tree with epiphytes, Harenna Forest, Bale Mountains National Park, Ethiopia

Chien Lee / Stream in lowland rainforest, Masoala National Park, Antsiranana, Madagascar

Matthias Breiter / Kestner Creek, Quinault Rainforest, Olympic National Forest, Washington

Michael & Patricia Fogden / Lianas in interior of lowland rainforest, La Selva Biological Research Station, Costa Rica

Chien Lee / Lowland rainforest with sunrays cutting through mist, Cuc Phuong National Park, Ninh Binh, Vietnam

Pete Oxford / Essequibo River, Iwokrama Rainforest Reserve, Guyana

Thomas Marent / Tall trees covered with plants in lowland rainforest, Danum Valley Conservation Area, Borneo, Malaysia

Gerry Ellis / Temperate rainforest with moss covered trees and ferns, Queets River Valley, Olympic National Park, Washington

Gerry Ellis / Gombe stream flowing through dense low montane tropical rainforest inside Gombe Stream National Park, Tanzania

Konrad Wothe / Hopetoun Falls on the Aire River flowing through rainforest, Otway National Park, Victoria, Australia

Konrad Wothe / Rainforest interior dominated by palms, Irian Jaya, New Guinea, Indonesia

Konrad Wothe / Rainforest interior dominated by palms, Irian Jaya, New Guinea, Indonesia

Tui De Roy / Palm trees and water flowing on beach on Palmyra Atoll, a wet, equatorial atoll with fringing reefs, native forests and abundant seabirds, Palmyra Atoll National Wildlife Refuge, US Line Islands

David Fleetham / A taro (Colocasia esculenta) field on the island of Yap, Federated States of Micronesia, Pacific Ocean.