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)....