Linda Pitkin / 2020VISION / Male Black faced blenny (Tripterygion delaisi), part of a sequence showing colour change, Swanage, Dorset, England, UK, May. 2/4

Tony Heald / Black faced Impala (Aepyceros melamis petersi) female jumping, Etosha National Park, Namibia

Tony Heald / Black faced Impala (Aepyceros melamis petersi) female jumping, Etosha National Park, Namibia

Laurie Campbell / Black-faced sheep (Ovis domesticus) ewe with lamb, Lanarkshire, Scotland, April

Jane Burton / White-faced black-and-white Border Collie puppy.

Sharon Heald / Black-faced Impala (Aepyceros melamis petersi) male standing in a field of Devil's Thorn flowers (Tribulus terrestris). Etosha National Park, Namibia, January.

Alex Hyde / Close-up of the extendable silk net of the Ogre faced / Net-casting spider {Deinopis sp}, Masoala Peninsula National Park, north east Madagascar.

Wild Wonders of Europe / Banfi / Male Yellow triplefin blenny (Tripterygion delaisi) Larvotto Marine Reserve, Monaco, Mediterranean Sea, July 2009

Vincent Grafhorst / Black-faced Vervet Monkey (Cercopithecus aethiops) baby clinging to mother, Moremi Game Reserve, Okavango Delta, Botswana

Michael & Patricia Fogden / Black-faced Impala (Aepyceros melampus petersi) male, females, and young drinking at waterhole, Etosha National Park, Namibia

Tony Heald / Lappet faced vulture {Torgos tracheliotus} being attacked by an aggresive Black backed jackal {Canis mesomelas} Etosha NP, Namibia

Gerry Ellis / Black-faced Vervet Monkey (Cercopithecus aethiops) pair playing on camera and tripod, Barbados, Caribbean, native to East and southern Africa

Tui De Roy / Bare-faced Curassow (Crax fasciolata) male in typical Cerrado habitat, Emas National Park, Brazil

Colin Seddon / Scottish black-faced breed ram {Ovis aries} Scotland, UK

Tony Heald / Black face impala portrait {Aepyceros melampus petersi} Etosha NP, Namibia

Richard Du Toit / Vervet Monkey (Chlorocebus aethiops) foraging inside tree trunk, Limpopo, South Africa

Richard Du Toit / Vervet Monkey (Chlorocebus aethiops) baby holding tightly to mother's fur, Limpopo, South Africa

Richard Du Toit / Vervet Monkey (Chlorocebus aethiops) jumping, Limpopo, South Africa

Linda Pitkin / 2020VISION / Male Black faced blenny (Tripterygion delaisi), part of a sequence showing colour change, Swanage, Dorset, England, UK, May. 4/4

Linda Pitkin / 2020VISION / Male Black faced blenny (Tripterygion delaisi), part of a sequence showing colour change, Swanage, Dorset, England, UK, May. 3/4

Linda Pitkin / 2020VISION / Male Black faced blenny (Tripterygion delaisi), part of a sequence showing colour change, Swanage, Dorset, England, UK, May. 1/4

Sue Daly / Black faced blenny (Tripterygion delaisi) female camouflaged against habitat, Channel Islands, UK July

Sue Daly / Black faced blenny (Tripterygion delaisi) male camouflaged against anemones, Channel Islands, UK May

Charlie Summers / Black-faced Sandgrouse (Pterocles decoratus) on ground. Tarangire National Park, Tanzania

Tony Heald / Black faced Impala (Aepyceros melamis petersi) female jumping, Etosha National Park, Namibia

Tony Heald / Black faced Impala (Aepyceros melamis petersi) female jumping, Etosha National Park, Namibia

Roland Seitre / Black-faced Sandgrouse (Pterocles decoratus). Tana River District, Kenya.

Konrad Wothe / Black-faced Vervet monkeys (Cercopithecus pygerythrus) female with young, Mahale Mountains National Park, Tanzania, East Africa

Dave Watts / Five Black-faced cormorants (Phalacrocorax fuscescens) on coastal rocks, one with wings stretched out, Tasmania, Australia, February

Dave Watts / Black-faced cormorant (Phalacrocorax fuscescens) on rock, Tasmania, Australia, February

Dave Watts / Black-faced cormorant (Phalacrocorax fuscescens) on rock, Tasmania, Australia, February

Martin Willis / Black-faced Woodswallow (Artamus cinereus), Townsville, Queensland, Australia

Konrad Wothe / Black-faced Vervet Monkey (Cercopithecus aethiops) mother with young, Mahale Mountains National Park, Tanzania

Konrad Wothe / Black-faced Vervet Monkey (Cercopithecus aethiops) mother with young, Mahale Mountains National Park, Tanzania

Steven David Miller / Female Western grey / Black-faced / Mallee kangaroo (Macropus fuliginosus) feeding with joey looking out of pouch, Flinders Ranges National Park, South Australia, May

Steven David Miller / Western grey / Black-faced / Mallee kangaroo (Macropus fuliginosus) joey looking out of pouch, Flinders Ranges National Park, South Australia, May

Steven David Miller / Western grey / Black-faced / Mallee kangaroo (Macropus fuliginosus) joey looking out of pouch, Flinders Ranges National Park, South Australia, May

Steven David Miller / Female Western grey / Black-faced / Mallee kangaroo (Macropus fuliginosus) foraging with joey looking out of pouch, Flinders Ranges National Park, South Australia, May

Steven David Miller / Western grey / Black-faced / Mallee kangaroo (Macropus fuliginosus) joey looking out of pouch, Flinders Ranges National Park, South Australia, June

Steven David Miller / Western grey / Black-faced / Mallee kangaroo (Macropus fuliginosus) joey looking out of pouch, Flinders Ranges National Park, South Australia, June

ZSSD / Black Spider Monkey (Ateles paniscus) mother with baby climbing tree, Manu National Park, Peru

Brent Stephenson / Three Black-faced Ibis (Theristicus melanopis) in flight. Over the Beagle Channel, Tierra del Fuego Archipelago, South America, January.

Brent Stephenson / Three Black-faced Ibis (Theristicus melanopis) in flight. Over the Beagle Channel, Tierra del Fuego Archipelago, South America, January.

Solvin Zankl / Blenny (Tripterygion delaisi) San Pietro Island, Sardinia, Italy, Mediterranean, July

Steve Gettle / Black-faced Solitaire (Myadestes melanops), Costa Rica

Martin Willis / Black-faced Monarch (Monarcha melanopsis) in rainforest, Malanda, Queensland, Australia

Oriol Alamany / Black faced Ibis (Theristicus melanopis), Torres del Paine National Park, Chile

Roberto Rinaldi / Black faced blenny (Tripterygion delaisi) amongst fronds of invasive algae (Caulerpa taxifolia) Strait of Messina, Southern Italy

Ole Jorgen Liodden / Black-faced Sandgrouse (Pterocles decoratus) on ground. Samburu, Kenya, December.

Ole Jorgen Liodden / Nazca Booby (Sula dactylatra granti) with dark background. Galapagos

Sue Daly / Black-face Blenny (Tripterygion delaisi) male. Channel Islands, UK, July.

Sue Daly / Black-face Blenny (Tripterygion delaisi), male. Channel Islands, UK, June.

Mary McDonald / Black-faced vervet monkey (Chlorocebus / Cercopithecus pygerythrus) in tree, Samburu Game Reserve, Kenya, East Africa

Mary McDonald / Black-faced vervet monkey (Chlorocebus / Cercopithecus pygerythrus) in tree, Samburu Game Reserve, Kenya, East Africa

Mary McDonald / Black-faced vervet monkey (Chlorocebus / Cercopithecus pygerythrus) young playing, Samburu Game Reserve, Kenya, East Africa

Mary McDonald / Black-faced vervet monkey (Chlorocebus / Cercopithecus pygerythrus) female grooming male young, Samburu Game Reserve, Kenya, East Africa

Mary McDonald / Black-faced vervet monkey (Chlorocebus / Cercopithecus pygerythrus) female grooming male young, Samburu Game Reserve, Kenya, East Africa

Nature Production / Lesser Cuckoo's egg (Cuculus poliocephalus) in host nest of Black faced bunting (Emberiza spodocephala), Japan

Pete Oxford / Mixed flock of whistling ducks and ibis taking flight. White-faced Whistling Duck (Dendrocygna viduata), Black-bellied Whistling-duck (Dendrocygna autumnalis), Scarlet Ibis (Eudocimus ruber). Hato Ma...

Marie Read / Black-faced Monarch (Monarcha melanopsis) perching. Lake Eacham National Park, Queensland, Australia, October.

Murray Cooper / Black-faced Ibis (Theristicus melanopis) group, Andes, Ecuador

Mark Taylor / Black-faced Ibis (Theristicus melanopis) pair walking together across grass. El Calafate, Argentina, Patagonia, South America, March.

Luiz Claudio Marigo / Bare-faced / Whispering Ibis (Phimosus infuscatus) by water. The Pantanal wetlands of Mato Grosso State, Brazil, October.

Luiz Claudio Marigo / Bare-faced Curassow (Crax fasciolata) male standing at waters edge. The Pantanal wetlands of Mato Grosso State, Brazil, October.

Tony Heald / Two male Black-faced Impala (Aepyceros melamis petersi) fighting with interlocked horns. Etosha National Park, Namibia, January.

Tony Heald / Black-faced Impala (Aepyceros melamis petersi) male jumping ("stotting" or "pronking") to demonstrate fitness to potential mates, competitors and predators. Devil's Thorn fl (Tribulus terrestris) in f...

Philippe Clement / Scottish Black Faced / Blackface Sheep (Ovis aries) ewe and lamb in field in the Highlands, Scotland, UK, May

Philippe Clement / Scottish Black Faced / Blackface sheep (Ovis aries) lamb and ewe resting in field in the Highlands, Scotland, UK, May

Murray Cooper / Black-faced Dacnis (Dacnis lineata) male, Colombia

Murray Cooper / Black-faced Dacnis (Dacnis lineata) male feeding on fruit, Colombia

Murray Cooper / Black-faced Ibis (Theristicus melanopis) pair walking through field, Ecuador

Sue Daly / Black faced blenny (Tripterygion delaisi) resting on rock, Channel Isles, UK, August

Sue Daly / Black faced blenny (Tripterygion delaisi) resting on rock, Channel Isles, UK, August

Anup Shah / Head portrait of Lappet-faced vulture (Aegypius tracheliotus) Masai Mara National Reserve, Kenya. March

Anup Shah / Head portrait of two Lappet-faced vultures (Aegypius tracheliotus) Masai Mara National Reserve, Kenya. March

Anup Shah / Head portrait of Lappet-faced vulture (Aegypius tracheliotus) Masai Mara National Reserve, Kenya. March

Anup Shah / Head portrait of Lappet-faced vulture (Aegypius tracheliotus) Masai Mara National Reserve, Kenya. March

Patricio Robles Gil / Black faced laughingthrush (Garrulax affinis) Sagarmatha National Park, Himalayas, Nepal, November

David Kjaer / Black faced sheep, Deeside, Scotland, April 2009

Chris Gomersall / Black-faced impala (Aepyceros melampus petersi) male, Etosha National Park, Namibia, November

Roy Mangersnes / Black-faceD Ibis (Theristicus melanopis) Tierra Del Fuego, Argentina, South America. November.

Roy Mangersnes / Black-faces Ibis (Theristicus melanopis) stretching wings, Tierra Del Fuego, Argentina, South America. November.

Laurie Campbell / Black-faced Ewe (Ovis aries) with lamb, Glen Shee, Cairngorms National Park, Scotland, UK, April

Laurie Campbell / Black-faced Sheep (Ovis aries) Lammermuirs, East Lothian, Scotland, UK, March

Laurie Campbell / Black-faced Ram (Ovis aries) Lammermuir Hills, Berwickshire, Scotland, UK, April

Wild Wonders of Europe / Banfi / Male Yellow triplefin blenny (Tripterygion delaisi) Larvotto Marine Reserve, Monaco, Mediterranean Sea, July 2009

Hanne & Jens Eriksen / Masked booby {Sula dactylatra} adult in flight, Oman

Tui De Roy / Black-faced Ibis (Theristicus melanopis), Patagonia, Argentina

Tui De Roy / Black-faced Ibis (Theristicus melanopis), Patagonia, Argentina

Tui De Roy / Black-faced Ibis (Theristicus melanopis), Patagonia, Argentina

Tony Heald / Female Black-faced impala (Aepyceros melamis petersi) jumping, Etosha National Park, Namibia, January

Sharon Heald / Black faced impala (Aepyceros melamis petersi) at waters edge with Wildebeest (Connochaetes taurinus) grazing, Etosha National Park, Namibia, January

Sue Daly / Black-faced blenny {Tripterygion delaisi} female on seabed, Channel Islands, UK

Sue Daly / Black-faced blenny {Tripterygion delaisi} male, Channel Islands, UK

Sue Daly / Black-faced blenny {Tripterygion delaisi} female on seabed, Channel Islands, UK