Christophe Courteau / Mountain gorilla (Gorilla beringei beringei) blackback, juvenile male demonstrating power. Volcanoes National Park, Rwanda.

Christophe Courteau / Mountain gorilla (Gorilla beringei beringei) blackback, juvenile male demonstrating power. Volcanoes National Park, Rwanda.

Orsolya Haarberg / Eurasian beaver (Castor fiber) demonstrating stick display, territorial behaviour, Telemark, Norway, June

Orsolya Haarberg / Eurasian beaver (Castor fiber) demonstrating stick display, territorial behaviour, Telemark, Norway, June

Orsolya Haarberg / Eurasian beaver (Castor fiber) demonstrating stick display, territorial behaviour, Telemark, Norway, June

Jeff Rotman / Tiger shark (Galeocerdo cuvier) demonstrating aggressive behavior, Red Sea, Egypt

Jeff Rotman / Diver holds 20 kilo Northern / American Lobster (Homarus americanus) with claws open, demonstrating aggressive behavior, New England, USA, North Atlantic Ocean. Model released Model released.

Kim Taylor / Ruby-topaz Hummingbird (Chrysolampis mosquitus) male flying demonstrating how brilliant colours only show when the bird is viewed from the front, Digital composite, Trinidad.

David Woodfall / Young people protesting climate change at 'Strike 4 Climate Change' March. Shrewsbury, England, UK. March 2019. Editorial use only.

David Woodfall / Children protesting climate change at 'Strike 4 Climate Change' March. Shrewsbury, England, UK. March 2019. Editorial use only.

David Woodfall / Mother and child protesting climate change at 'Strike 4 Climate Change' March. Shrewsbury, England, UK. March 2019. Editorial use only.

David Woodfall / Children protesting climate change at 'Strike 4 Climate Change' March. Shrewsbury, England, UK. March 2019. Editorial use only.

David Woodfall / Children protesting climate change at 'Strike 4 Climate Change' March. Shrewsbury, England, UK. March 2019. Editorial use only.

SCOTLAND: The Big Picture / Wild venison producer, Forest to Fork, demonstrating Quality Assurance certification for culled deer. Meat products in background. Culbokie, Ross and Cromarty, Scotland, UK.

Magnus Lundgren / Wild Wonders of China / Woman from Ocean Park Conservation Foundation Hong Kong, in charge of the seahorse survey, demonstrating seahorse tagging before dive, Hong Kong, China. June, 2016.

Ashley Cooper / Former BBC weatherman Michael Fish, the actress Greta Scacchi and the actor Peter Capaldi at the Stop Climate Chaos Coalition Demonstration. London, England, UK, December. Saturday 5th December 2009.

Ashley Cooper / Former BBC weatherman Michael Fish, the actress Greta Scacchi and the actors Peter Capaldi and Junade Khan at the Stop Climate Chaos Coalition Demonstration. London, England, UK, December. Saturday 5t...

Tony Wu / Small octopus (Octopus sp) sitting on orange sponge, demonstrating its ability to create hair-like projections with its skin, Ambon, Indonesia.

Jean E. Roche / Royal horse school of Jerez (Andalucia) demonstrating dressage techniques at Arles Arena, Bouches-du-Rhone, France, August 2008.

Pal Hermansen / Sign by farmers demonstrating for higher prices, Akershus, Norway, June 2012.

Anup Shah / Long-tailed macaque (Macaca fascicularis) female demonstrating begging gesture to be allowed to groom another. Bako National Park, Sarawak, Borneo, Malaysia. Mar 2010.

Cyril Ruoso / Biologist Franz Kaston Florez demonstrating how to use photo trap for tapir identification, Sierra Nevada de Santa Marta National Park, Colombia

Ann & Steve Toon / Big Life ranger demonstrating poisoned arrow used in elephant poaching, Mbirikani group ranch, Chyulu Hills, Amboseli-Tsavo ecosystem, Kenya, October 2012

Peter Cairns / 2020VISION / Man demonstrating birdbox building to children as part of Flora of the Fells day. Helvellyn, Lake District National Park, Cumbria, September.

Peter Cairns / 2020VISION / Man demonstrating birdbox building as part of Flora of the Fells day. Helvellyn, Lake District National Park, Cumbria, September.

Carol Walker / Lusitano horse, stallion demonstrating dressage move outside the Royal Riding School, Lisbon, Portugal, model released

Carol Walker / Lusitano horse, stallion demonstrating dressage leap, Portugal, 2011, model released

Claudio Contreras / Clouded Anole Lizard (Anolis nebulosus) on leaf, demonstrating gecko-like climbing abilites. Maria Madre Island, Islas Marias Biosphere Reserve, Sea of Cortez (Gulf of California), Mexico, July.

Roland Seitre / European Chameleon (Chamaeleo chamaeleon) demonstrating independent eye movement. Captive, indigenous to southern Europe. Sequence 5 of 5.

Roland Seitre / European Chameleon (Chamaeleo chamaeleon) demonstrating independent eye movement. Captive, indigenous to southern Europe. Sequence 4 of 5.

Roland Seitre / European Chameleon (Chamaeleo chamaeleon) demonstrating independent eye movement. Captive, indigenous to southern Europe. Sequence 3 of 5.

Roland Seitre / European Chameleon (Chamaeleo chamaeleon) demonstrating independent eye movement. Captive, indigenous to southern Europe. Sequence 1 of 5.

Roland Seitre / Panther Chameleon (Furcifer pardalis) portrait, demonstrating independent eye movement. Captive, indigenous to Madagascar. Sequence 4

Roland Seitre / Panther Chameleon (Furcifer pardalis) portrait, demonstrating independent eye-movement. Captive, indigenous to Madagascar. Sequence 2

Roland Seitre / Brown-throated Three-toed Sloths (Bradypus variegatus) hanging from a tree trunk, demonstrating bark-mimicking colouration. Captive. Aviarios del Caribe Sloth Sanctuary, Costa Rica.

Benoit Stichelbaut / New passengers attend a survival suit demonstration on the quarter deck. BHO Beautemps-Beaupre, Iroise Sea, Briitany, France. August 2005.

Solvin Zankl / Common fruit fly (Drosophila melanogaster) laboratory culture of flies demonstrating various mutations at Vienna Drosophila RNAi Center, Institute for Molecular Pathology, Austria, September 2010

Bryan and Cherry Alexander / Little auks (Alle alle) in flight, demonstrating their characteristic tight formation. Spitsbergen, Svalbard, Norway, June.

Sue Daly / Angler Fish (Lophius piscatorius) demonstrating its camouflage, mimicking its sandy habitat. Channel Islands, UK, July.

Sue Daly / Blonde Ray (Raja brachyura) demonstrating camouflage against sandy habitat. Channel Islands, UK, August.

Sue Daly / Angler Fish (Lophius piscatorius) demonstrating its camouflage, mimicking its sandy habitat. Channel Islands, UK, July.

Bryan and Cherry Alexander / Man demonstrating the layers he wears to keep warm (underwear, mid layers, outer layer, jacket & mittens) Antarctica, January 2006. Digital composite.

Charlie Summers / Wandering Albatross (Diomedea exulans) in flight, demonstrating the widest wingspan of any living bird species. Prion Island, South Georgia, January.

Alex Mustard / 2020VISION / A Grey seal (Halichoerus grypus) seems content to have found a diver's fin to play with, Lundy Island, Bristol Channel, England, UK, May. Grey seals will seek out divers and clearly enjoy demonstrati...

Florian Möllers / Forester George Majumder demonstrating remainder of front leg of Wild boar (Sus scrofa) as prey item of White-tailed Sea eagle (Haliaeetus albicilla), Berlin, Germany, May 2008

Tim Laman / Waved albatross (Phoebastria irrorata) pair demonstrating mating behaviour, Espanola Island, Galapagos, Critically endangered

Tim Laman / Waved albatross (Phoebastria irrorata) pair demonstrating mating behaviour, Espanola Island, Galapagos, Critically endangered

Tim Laman / Waved albatross (Phoebastria irrorata) pair demonstrating mating behaviour, Espanola Island, Galapagos, Critically endangered

Tim Laman / Waved albatross (Phoebastria irrorata) pair demonstrating mating behaviour, Espanola Island, Galapagos, Critically endangered

Tim Laman / Waved albatross (Phoebastria irrorata) pair demonstrating mating behaviour, Espanola Island, Galapagos, Critically endangered

Tim Laman / Waved albatross (Phoebastria irrorata) pair demonstrating beak clapping behaviour, Espanola Island, Galapagos, Critically endangered

Tim Laman / Waved albatross (Phoebastria irrorata) pair demonstrating beak clapping behaviour, Espanola Island, Galapagos, Critically endangered

Jeff Rotman / Tiger Shark (Galeocerdo cuvier) demonstrating aggressive behavior, Great Barrier Reef, Australia, Coral Sea.

Jeff Rotman / Dolphin trainer hugging two Bottlenose Dolphins (Tursiops truncatus), demonstrating affection between trainer and dolphins, Dolphin Reef, Eilat, Israel, Red Sea. Model released Model released.

Stephen Dalton / Greater false vampire bat (Megaderma lyra) flying in complete darkness between wire strands, demonstrating echo location, Research at Frankfurt University, Germany, controlled conditions

Anup Shah / Common zebra (Equus quagga) male and female demonstrating 'Flehmen' courtship behaviour. Masai Mara National Reserve, Kenya. March

Anup Shah / Common zebra (Equus quagga) male and female demonstrating 'Flehmen' courtship behaviour. Masai Mara National Reserve, Kenya. March

Merryn Thomas / Animal Rights demonstration outside the Sheldonian Theatre, Broad Steet, Oxford. June 2009.

Tom Gilks / The Wave, climate change march ahead of the Copenhagen climate summit. People carrying large banner stating 'Climate Change - Act Now' London, UK, 5th December 2009

Michele Westmorland / Man demonstrating coconut meat harvesting for tourists, Rano Island, Vanuatu May 2008

Michele Westmorland / Young men in traditional dress demonstrating headdress for tourists, Rano Island, Vanuatu May 2008

Jeff Rotman / Tiger Shark (Galeocerdo cuvier) demonstrating aggressive behavior, Red Sea.

Jane Burton / Demonstrating cardiac massage on elderly Lurcher

Jane Burton / Demonstrating cardiac massage on Sable Border Collie, Model released

ZSSD / Galapagos Giant Tortoise (Chelonoidis nigra) adult with hatchling demonstrating growth, native to Galapagos Islands, Ecuador

Norbert Wu / Simulated specimen collecting for the aquarium fish trade, demonstrating the use of cyanide to stun fish which kills coral reefs as a side effect, Philippines

Juergen Freund / Demonstration against forest clearance on Vancouver Island, British Columbia, Canada

Bryan and Cherry Alexander / Man demonstrating clothing layers (outer layer) at Mount Vinson Base Camp. Vinson Massif, Antarctica, January 2006.

Bryan and Cherry Alexander / Man demonstrating clothing layers (outer mid layer) at Mount Vinson Base Camp. Vinson Massif, Antarctica, January 2006.

Bryan and Cherry Alexander / Man demonstrating clothing layers (outer mid layer) at Mount Vinson Base Camp. Vinson Massif, Antarctica, January 2006.

Bryan and Cherry Alexander / Man demonstrating clothing layers (mid layer) at Mount Vinson Base Camp. Vinson Massif, Antarctica, January 2006.

Bryan and Cherry Alexander / Man demonstrating clothing layers (mid layer) at Mount Vinson Base Camp. Vinson Massif, Antarctica, January 2006.

Klaus Nigge / Staff member at Highgate Ostrich Show Farm holding neck of Ostrich (Struthio camelus), demonstrating anatomical features to visitors of ostrich tour. The Ostrich is fixed in a rack. Highgate Ostrich S...

Kim Taylor / Water fleas (Daphnia species) swimming. They're demonstrating negative buoyancy, continously swimming to stay in one place. Guildford, Surrey, UK.

Will Watson / Wheelbarrow demonstrating Chicken farming waste pollution at Extinction Rebellion's Save the Wye Campaign protest, Avara Cargill Chicken Processing Factory, Hereford, Herefordshire, UK, April 8th...

Will Watson / 12,000 year old Ice Age pond, cut in half by an old drain, The Sturts East Nature Reserve, England, UK, January. Ice has melted over the drain because of water movement, demonstrating it is still func...

Kristel Richard / Two pompilho (Portuguese cowboys), riding Lusitano horses and demonstrating skills with garrochas, Feira da Golega, Ribatejo, Portugal. Garrochas are long poles used to move cows.

Charlie Hamilton-James / Scout from David Sheldrick Wildlife Trust demonstrating how to use bow and poison arrow to ranger from Kenya Wildlife Service, Tsavo West National Park, Kenya, Africa. November, 2015.

Will Watson / Freshwater biologist, Will Watson, demonstrating greenhouse gas release, anaerobic pond, Shropshire, England, UK. May, 2021. Model released.

Jack Dykinga / Collared peccary / Javalina (Pecari tajacu) demonstrating directional nose that it can rotate to sense potential danger, Santa Catalina Mountain foothills, Arizona, USA.

Andy Sands / Slime mould (Lamproderma scintillans) sporangia developing on beech leaf demonstrating their hydrophobic peridium, Buckinghamshire, England, UK, March Focus Stacked.

Juergen Freund / West Papuan women demonstrating the preparation of sago, a starchy staple most commonly extracted from pith of Sago palm (Metroxylon sagu). West Papua, Indonesia. 2018.

Brian Bevan / Close-up of a Harvest mouse (Micromys minutus) in nest amongst wheat stalks, demonstrating use of prehensile tail, Bedfordshire, England, UK. Captive.

Sylvain Cordier / Mongol in traditional dress riding horse, demonstrating pitching. Bashang Grassland, near Zhangjiakou, Hebei Province, Inner Mongolia, China. 2018.