Jabruson Motion / Silverback Western gorilla (Gorilla gorilla) 'Makumba', leader of the 'Makumba' troop, breaking into a termite's nest in order to feed, Bai Hokou, Dzanga-Ndoki National Park, Central African Republic

Jabruson Motion / Silverback Western gorilla (Gorilla gorilla) 'Makumba', leader of the 'Makumba' troop, breaking into a termite's nest in order to feed, Bai Hokou, Dzanga-Ndoki National Park, Central African Republic

Christophe Courteau / Silverback Mountain gorilla (Gorilla beringei) in the bamboo forest, this is Munyinya the leader of Hirwa group, Sabyinyo volcano, Volcano National Park, Rwanda

Juergen Freund / Leader of the Drought Experiment Dr. Susan Laurance and Dr. Yoko Ishida downloading data from the trees carrying scientific instruments at the Daintree Rainforest Observatory, Queensland, Australia. D...

Juergen Freund / James Cook University's Susan Laurance - Tropical Leader at the Centre for Tropical Environmental and Sustainability Studies and College of Marine and Environmental Sciences leads the Daintree Dro...

Ashley Cooper / First Nation Canadians protest against the destruction and pollution of the Tar Sands industry at the 4th annual Healing Walk north of Fort McMurray, Alberta, Canada. August 2012

Ashley Cooper / Snowman with sign with the legend 'World leaders have failed us' in protest to the results of the Copenhagen climate talks. Wrynose Pass, Lake District, England, UK. March.

Ashley Cooper / Bedzed the UK's largest eco carbon neutral housing complex in Beddington, London, UK, May 2007.

Christophe Courteau / Chimpanzees (Pan troglodytes schweinfurthi) dominant male on left is the leader of the group, grooming one of his lieutenants, Kibale NP, Uganda

Christophe Courteau / Chimpanzee (Pan troglodytes schweinfurtheii) 'Mobutu' an old male, leader of the group, at rest, Kibale Forest NP, Uganda

Cyril Ruoso / Locally born Mr Bokika is the leader of M'boumontour NGO which supports different kind of conservation project within the community with the aim of protecting local Bonobo populations (Pan paniscus)....

Cyril Ruoso / Locally born Mr Bokika is the leader of M'boumontour NGO which supports different kind of conservation project within the community with the aim of protecting local Bonobo populations (Pan paniscus)....

Cyril Ruoso / Locally born Mr Bokika is the leader of M'boumontour NGO which supports different kind of conservation project within the community with the aim of protecting local Bonobo populations (Pan paniscus)....

Cyril Ruoso / Locally born Mr Bokika is the leader of M'boumontour NGO which supports different kind of conservation project within the community with the aim of protecting local Bonobo populations (Pan paniscus) D...

Cyril Ruoso / Mr Bokika with trackers in charge of Bonobo (Pan paniscus) habituation. Mr Bokika is the leader of M'boumontour NGO, supporting the development and protection of the local bonobo population, Democrat...

Cyril Ruoso / Mr Bokika with trackers in charge of Bonobo (Pan paniscus) habituation. Mr Bokika is the leader of M'boumontour NGO, supporting the development and protection of the local bonobo population, Democrat...

Charlie Summers / Salmon tenders 'Majestik' and 'Fierce Leader' these boats transfer fish from fishing boats to the canneries so the boats can continue fishing. Neets Bay, Alaska, The boats are the Majestik on the rig...

Jeff Rotman / Leader Creek Fisheries cannery preparing fresh Sockeye salmon (Oncorhynchus nerka) fillets for export worldwide. Naknek, Bristol Bay, Alaska, July 2015.

Jeff Rotman / Leader Creek Fisheries cannery preparing fresh Sockeye salmon (Oncorhynchus nerka) fillets for export worldwide. Naknek, Bristol Bay, Alaska. July 2015.

Anup Shah / Eastern Chimpanzee (Pan troglodytes schweinfurthii) female, thirty years old, walking and carrying her one year old son, with her seven and three year old daughters following, Gombe National Park, Tan...

Jabruson Motion / Silverback Western gorilla (Gorilla gorilla) 'Makumba', leader of the 'Makumba' troop, breaking into a termite's nest in order to feed, Bai Hokou, Dzanga-Ndoki National Park, Central African Republic

Jabruson Motion / Portrait of Silverback Western gorilla (Gorilla gorilla) 'Makumba', leader of the 'Makumba' troop, panning down to a piece of termite nest held in his hand, Bai Hokou, Dzanga-Ndoki National Park, Cent...

Jabruson Motion / Silverback Western gorilla (Gorilla gorilla) 'Makumba', leader of the 'Makumba' troop, eating termites, Bai Hokou, Dzanga-Ndoki National Park, Central African Republic

Jabruson Motion / Silverback Western gorilla (Gorilla gorilla) 'Makumba', leader of the 'Makumba' troop, breaking into a termite's nest in order to feed, Bai Hokou, Dzanga-Ndoki National Park, Central African Republic

Jabruson Motion / Silverback Western gorilla (Gorilla gorilla) 'Makumba', leader of the 'Makumba' troop, standing up and walking away, leaving frame, Bai Hokou, Dzanga-Ndoki National Park, Central African Republic

Jabruson Motion / Silverback Western gorilla (Gorilla gorilla) 'Makumba', leader of the 'Makumba' troop, walking into frame and looking back at broken termite nest, Bai Hokou, Dzanga-Ndoki National Park, Central Africa...

Staffan Widstrand / CRINEO project leader Premanjali Rao, Pulicat Lake, Tamil Nadu, India, January 2013.

Roland Seitre / Anna Baouma from ASPO trapping Polynesian rat (Rattus exulans) around wharf as part of invasive species management, Lekiny, Ouvea, Loyalty Islands Province, New Caledonia, August 2012.

Roland Seitre / Polynesian rat (Rattus exulans) in trap around wharf as part of invasive species management project by ASPO. Lekiny, Ouvea, Loyalty Islands Province, New Caledonia, August 2012.

Roland Seitre / Polynesian rat (Rattus exulans) in trap around wharf as part of invasive species management project by ASPO. Lekiny, Ouvea, Loyalty Islands Province, New Caledonia, August 2012.

Roland Seitre / Antoine Barnaud veterinarian from the ASPO team, setting trap for Polynesian rat (Rattus exulans) as part of invasive species management project, on the Hwadrilla Wharf, Ouvea, Loyalty Islands Provinc...

Jabruson / Western lowland gorilla (Gorilla gorilla gorilla) silverback 'Makumba' portrait, leader of tourist habituated gorilla family group, Bai Hokou, Dzanga-Ndoki National Park, Central African Republic.

Jabruson / Western lowland gorilla (Gorilla gorilla gorilla) silverback 'Makumba' moving through the forest, blurred motion, he is the leader of the habituated gorilla family that goes by the same name, Bai Hoko...

Jabruson / Western lowland gorilla (Gorilla gorilla gorilla) silverback 'Makumba' sleeping after a morning of feeding. 'Makumba' is the leader of the habituated gorilla family that goes by the same name, Bai Hok...

Jabruson / Western lowland gorilla (Gorilla gorilla gorilla) silverback 'Makumba' sleeping after a morning of feeding. 'Makumba' is the leader of the habituated gorilla family that goes by the same name, Bai Hok...

Jabruson / Western lowland gorilla (Gorilla gorilla gorilla) silverback 'Makumba' resting during a morning of feeding. He is the group leader of the habituated gorilla family that goes by the same name, Bai Hoko...

Rick Tomlinson / Farr 40 leader "Narone" during a race at the 2009 Acura Miami Grand Prix, day 2, 6th March.

Rick Tomlinson / Farr 40 leader "Nerone" during a race at the 2009 Acura Miami Grand Prix, day 2, 6th March.

Rick Tomlinson / "Green Dragon" Watch leader Neal Mc Donald (GBR) during in-port race training in Alicante, Spain, for the 10th Volvo Ocean Race 2008-2009. For EDITORIAL USE only.

Rick Tomlinson / Watch leader Magnus Olsson (SWE) on "Ericsson 3", which finished third on leg one of the Volvo Ocean Race into Cape Town, November 2008. 10th Volvo Ocean Race, 2008-09. For EDITORIAL USE only.

Rick Tomlinson / Watch leader Magnus Olsson (SWE) with his two sons on "Ericsson 3", which finished third on leg one of the Volvo Ocean Race into Cape Town, November 2008. 10th Volvo Ocean Race, 2008-09. For EDITORIAL...

Rick Tomlinson / Watch leader Magnus Olsson (SWE) on "Ericsson 3", which finished third on leg one of the Volvo Ocean Race into Cape Town, November 2008. 10th Volvo Ocean Race, 2008-09. For EDITORIAL USE only.

Juergen Freund / WWF Philippines Taytay Project Leader checking her Irrawaddy dolphin (Orcaella brevirostris) photo ID pictures. North Palawan, Philippines, May 2009.

Charlie Summers / Mustang (Equus caballus) herd following the leader in single file as they approach the only water for them in the Namib-Naukluft National Park of Namibia near Garub, Southern Africa

Tim Laman / Boxer crab (Lybia tesselata) holding small sea anemones in its claws (a mechanism for defense in this species). Bali, Indonesia

Tim Laman / Honey hunter team leader Mathab Gazi (seated) and team members with the basket of the first honey collected for the season, Sundarbans, Khulna Province, Bangladesh, April 2006

Ingo Arndt / Hanuman Langur (Semnopithecus entellus) calling, Jodhpur, India

George Chan / A Mongolian horseman rides within the ruined walls of Xanadu (also known as ShangDu) where Kublai Khan, leader of the Mongolian empire, had his summer capital. Inner Mongolia, northern China. July 200...

George Chan / A Mongolian horseman rides within the ruined walls of Xanadu (also known as ShangDu) where Kublai Khan, leader of the Mongolian empire, had his summer capital. Inner Mongolia, northern China. July 200...

George Chan / A Mongolian horseman rides within the ruined walls of Xanadu (also known as ShangDu) where Kublai Khan, leader of the Mongolian empire, had his summer capital. Inner Mongolia, northern China. July 200...

George Chan / The crumbling remains of walls at Xanadu (also known as ShangDu) where Kublai Khan, leader of the Mongolian empire, had his summer capital. Inner Mongolia, northern China. July 2006

Pete Oxford / Huaorani indian man on his mobile phone, Moi Enomenga, leader of the Quehueire Ono community and an influencial Huaorani leader, in Quito for a protest march against Petrobras, a Brazilian oil company...

Pete Oxford / Huaorani indian man, Moi Enomenga, leader of the Quehueire Ono community and an influencial Huaorani leader, in Quito for a protest march against Petrobras, a Brazilian oil company who wanted to build...

Pete Oxford / Huaorani indian man - Moi Enomenga, leader of the Quehueire Ono community and an influencial Huaorani leader, in Quito for a protest march against Petrobras, a Brazilian oil company who wanted to buil...

Pete Oxford / Huaorani indian woman (mother of Moi Enomenga, the leader of Quehueire Ono community and an influencial Huaorani leader) with balsa earplugs. Amazon rainforest, Yasuni NP, Ecuador, July 2005

Pete Oxford / Huaorani indian man, Moi Enomenga, leader of the Quehueire Ono community and an influencial Huaorani leader, in Quito for a protest march against Petrobras, a Brazilian oil company who wanted to build...

YURI SHIBNEV / Boris Konstantinovich Shibnev, leader of Ussurian nature conservation, Birkin river, Ussuriland, Primorsky, SE Siberia, Russia

Solvin Zankl / Group of King penguins {Aptenodytes patagonicus} on beach looking out to sea, Falkland Islands.

Michael Pitts / Huli wigman chief at Compensation ceremony, Central highlands Papua New Guinea

Norbert Wu / Atlantic Bluefin Tuna (Thunnus thynnus) in net as it is raised by fishermen with the leader or Rais of the Matanzas issuing directions, Mediterranean Sea, Sardinia, Italy

Norbert Wu / Atlantic Bluefin Tuna (Thunnus thynnus) in net as it is raised by fishermen with the leader or Rais of the Matanzas issuing directions, Mediterranean Sea, Sardinia, Italy

Jim Brandenburg / Arctic Wolf (Canis lupus) atop iceberg, Ellesmere Island, Nunavut, Canada

Asgeir Helgestad / Supported by his leader (man) male European grey wolf bares teeth to show female she is not welcome. {Canis lupus} Norway

Asgeir Helgestad / Man patting European grey wolf {Canis lupus} who exhibits submissive behaviour - Man is leader of the pack, Norway

Anup Shah / African elephants walking in line, Masai Mara, Kenya

Bryan and Cherry Alexander / Tour leader driving along the tunnel on the working coal mine tour of Mine 7. Spitsbergen, Norway, June 2006.

Bryan and Cherry Alexander / Tour leader explaining the machinery on the working coal mine tour of Mine 7. Spitsbergen, Svalbard, Norway, June 2006.

Roberto Rinaldi / The expedition leader communicating with divers while they are immersed in a crevasse, using underwater communication equipment, Perito Moreno glacier, Los Glaciares National Park, Patagonia, Argentin...

Norbert Wu / Atlantic Bluefin Tuna (Thunnus thynnus) harvest with leader of the fishermen surveying a school prior to harvesting them, Sardinia, Italy

Richard Du Toit / Attentive female African elephants with young {Loxodonta africana} Moremi WR Botswana

Ugo Mellone / Michele Galli, founder and leader of the Environomica NGO, which promotes reforestation and sustainable forest management, photographed at his home in Santa Marta, Colombia. December, 2021.

Ugo Mellone / The "mamo" (spiritual leader) of Encanto village, with his poporo, used for chewing of coca leaves. Sierra Nevada de Santa Marta, Colombia. December, 2021.

Ugo Mellone / Michele Galli, Environomica NGO founder and leader of the reforestation project, standing next to abandoned saws used for logging in Finca la Profunda. Logging was widespread in this area until a few...

Ugo Mellone / Michele Galli, Environomica NGO founder and leader of the reforestation project, standing next to a Tambor tree (Schizolobium parahyba) which he planted less than two years ago, Finca la Profunda, Sie...

Charlie Hamilton-James / Group of girls with the group leader, participating in group activity at 'Girl's Club' in the village of Samora Rachel, Gorongosa National Park, Mozambique. June, 2018.

Charlie Hamilton-James / Group of girls with the group leader, participating in group activity at 'Girl's Club' in the village of Samora Rachel, Gorongosa National Park, Mozambique. June, 2018.

Shane Gross / Caribbean reef shark (Carcharhinus perezii) with a wire leader hanging from her mouth off New Providence, Bahamas. Sharks are often observed with hooks, scars or other evidence of encounters with fish...

Colin Varndell / Susy Varndell leader of Dorset Mammal Group Hedgehog Project. Holding ghost hedgehog road signs used to raise awareness of hedgehog road deaths, and to encourage careful driving. Dorset, England, UK....

Tui De Roy / Washington (Wacho) Tapia, director of the Giant Tortoise Restoration Initiative and leader of the Wolf expedition Wolf Volcano, Isabela Island, Galapagos