Ole Jorgen Liodden / Fiordland crested penguin (Eudyptes pachyrhynchus) in foamy waves, Vulnerable species, Westland, New Zealand, November

Anup Shah / Celebes / Black crested macaque (Macaca nigra) sub-adult male yawning, Tangkoko National Park, Sulawesi, Indonesia.

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) sub-adult male head portrait, Tangkoko National Park, Sulawesi, Indonesia.

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) mature male head and shoulders portrait, Tangkoko National Park, Sulawesi, Indonesia.

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) sub-adult male head portrait, Tangkoko National Park, Sulawesi, Indonesia.

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) baby less than 1 month old in mothers arms, Tangkoko National Park, Sulawesi, Indonesia.

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) female head and shoulders standing portrait, Tangkoko National Park, Sulawesi, Indonesia.

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) two individuals greeting, Tangkoko National Park, Sulawesi, Indonesia.

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) female with suckling infant aged 9-12 months, Tangkoko National Park, Sulawesi, Indonesia.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) juvenile sitting on a tree, wet from playing in the river, wide angle perspective, Tangkoko National Park, Sulawesi, Indonesia.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) 'Alpha' baby female aged about 1 month hanging upside down in a tree, Tangkoko National Park, Sulawesi, Indonesia.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) two juveniles approaching with curiosity, one grimacing Tangkoko National Park, Sulawesi, Indonesia.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) group up close, watching with curiosity, Tangkoko National Park, Sulawesi, Indonesia.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) sub-adult male sitting on a beach, Tangkoko National Park, Sulawesi, Indonesia.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) sub-adult male resting on a fallen tree, Tangkoko National Park, Sulawesi, Indonesia.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) female sitting in a tree with her baby aged less than 1 month, Tangkoko National Park, Sulawesi, Indonesia.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) sub-adult male trying to break into bamboo to feed on ant eggs from a nest, Tangkoko National Park, Sulawesi, Indonesia.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) silhouette of juvenile sitting in a tree at coast, Tangkoko National Park, Sulawesi, Indonesia.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) sub-adult male head and shoulders portrait, Tangkoko National Park, Sulawesi, Indonesia.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) group watching with curiosity, Tangkoko National Park, Sulawesi, Indonesia

David Pattyn / Great Crested Grebe (Podiceps cristatus) with two young chicks on her back. La Dombes lake area, France, July.

Ole Jorgen Liodden / Fiordland crested penguin (Eudyptes pachyrhynchus) riding a foamy wave into the shore. Westland, New Zealand, Vulnerable species. November.

Ole Jorgen Liodden / Fiordland crested penguin (Eudyptes pachyrhynchus) in shallow water. Westland, New Zealand, Vulnerable species. November.

Ole Jorgen Liodden / Fiordland crested penguin (Eudyptes pachyrhynchus) being splashed by foam from surf, Westland, New Zealand, Vulnerable species. November.

Ole Jorgen Liodden / Fiordland crested penguin (Eudyptes pachyrhynchus) rear view, Westland, New Zealand, Vulnerable species. November.

David Pattyn / Great Crested grebe (Podiceps cristatus) swimming in early morning light carrying chick on back, La Dombes area, France, July

Juan Carlos Munoz / Double Breasted Cormorant (Phalacrocorax auritus) resting beak in plumage. Everglades National Park, Florida, USA, February.

Shibai Xiao / Hainan black-crested gibbon (Nomascus hainanus) young male in tree, Bawangling National Nature Reserve, Hainan Island, China.

Ben Hall / Great crested grebes (Podiceps cristatus) performing their elaborate courtship ritual at dawn, Cheshire, UK November

Ben Hall / Great crested grebes (Podiceps cristatus) performing courtship ritual at dawn, Cheshire, UK April

Ben Hall / Crested tit (Lophophanes cristatus) clinging to lichen covered tree in snowfall, Scotland, UK February

Bert Willaert / Juvenile South American Common / Crested Forest Toad 1+Rhinella margaritifera 'complex'+2. Ecuador, South America.

Petra Wegner / Chinese Crested Dog powderpuff, bitch standing.

Petra Wegner / Chinese Crested Dog, hairless puppy, 4 1/2 months / bitch.

Petra Wegner / Chinese Crested Dog, hairless.

Petra Wegner / Chinese Crested Dog, hairless bitch with puppy, male, 4 months.

Petra Wegner / Chinese Crested Dog, powderpuff puppy, 9 weeks.

Andrew Parkinson / 2020VISION / Great crested grebe (Podiceps cristatus) adult emerges from a thick mist into dawn sunlight, Derbyshire, UK, April. 2020VISION Book Plate.

Andrew Parkinson / 2020VISION / Great crested grebe (Podiceps cristatus) adult aggressively pursues another in a territorial dispute, Derbyshire, UK, March

Andrew Parkinson / 2020VISION / Great crested grebe (Podiceps cristatus) male mating with female who has shown her willingness to mate by lying on the nest site in front of a fishing platform, Derbyshire, UK, March, sequence 2/5

Andrew Parkinson / 2020VISION / Great crested grebe (Podiceps cristatus) adult in profile with a fish that it has just caught, Derbyshire, UK, June

Andrew Parkinson / 2020VISION / Great crested grebe (Podiceps cristatus) pair of adults during part of their elaborate courtship ritual during the very last few rays of evening sunlight, Derbyshire, UK, March.

Andrew Parkinson / 2020VISION / Great crested grebe (Podiceps cristatus) pair of adults during part of their elaborate courtship ritual during the very last few rays of evening sunlight, Derbyshire, UK, March.

Fabrice Cahez / Great crested grebe (Podiceps cristatus) pair displaying, Vosges, France, March

Andrew Parkinson / Great crested grebes (Podiceps cristatus) a pair of adults perform their elaborate courtship dance. Derbyshire, UK, March.

Andrew Parkinson / Great crested grebe (Podiceps cristatus) adult stretching its wings and neck in dawn sunlight. Derbyshire, UK, March.

Markus Varesvuo / Crested tit (Lophophanes cristatus) perched on frosted twig. Posio, Finland, January.

Terry Whittaker / 2020VISION / Great crested grebe (Podiceps cristatus) pair displaying on water at dawn, Rutland Water, Rutland, UK, April. Photographer quote: 'During the Rutland Water 2020VISION iWitness I was really struggling...

Andy Rouse / Great Crested Grebe (Podiceps cristatus) on water. Wales, UK, Europe, June.

Daniel Heuclin / Portrait of a Crested Forest Toad (Rhinella margaritifer). Controlled conditions. French Guyana, August.

Eric Baccega / Double crested cormorant (Phalacrocorax auritus) swimming on water at sunset, Cap Breton Highlands National Park, Nova Scotia, Canada, September

Andrew Parkinson / Pair of Great Crested Grebes (Podiceps cristatus) during their elaborate courtship dance. March. Derbyshire, UK, March (non-ex)

Fabio Liverani / Crested Newt (Triturus cristatus carnifex) underwater view of female swimming near surface, Traversari lake, Campigna National Park, Emilia Romagna and Tuscany regions, Italy

Fabio Liverani / Crested Newt (Triturus cristatus carnifex) split level view of female swimming near surface, Traversari lake, Campigna National Park, Emilia Romagna and Tuscany regions, Italy

Fabio Liverani / Crested Newt (Triturus cristatus carnifex) underwater view of female swimming on surface, Traversari lake, Campigna National Park, Emilia Romagna and Tuscany regions, Italy

Dietmar Nill / Great crested grebe (Podicepes cristatus) adult with chick on its back, Germany

Theo Allofs / Celebes Black Macaque (Macaca nigra) pair delousing, Sulawesi, Indonesia

Theo Allofs / Celebes Black Macaque (Macaca nigra) dominant male, Sulawesi, Indonesia

Andy Rouse / Great crested grebe (Podiceps cristatus) two chicks on mother's back, UK

Andy Rouse / Male Great crested grebe (Podiceps cristatus) feeding chicks being carried on female's back, UK

Wild Wonders of Europe / Radisics / Great crested grebe (Podiceps cristatus) Lake Skadar, Lake Skadar National Park, Montenegro, May 2008

Mark Bowler / Great crested newt (Triturus cristatus) swimming

Andrew Parkinson / Great crested grebe (Podiceps cristatus) pair during their elaborate courtship dance in dawn mist, Derbyshire, UK, March

Andrew Parkinson / Great crested grebe (Podiceps cristatus) pair performing part of their elaborate courtship dance, Derbyshire, UK, February

Andrew Parkinson / Great crested grebe (Podiceps cristatus) pair during part of their elaborate courtship ritual, Derbyshire, UK, March

Andrew Parkinson / Great crested grebe (Podiceps cristatus) pair during part of their elaborate courtship ritual, Derbyshire, UK, March

Andrew Parkinson / Great crested grebe (Podiceps cristatus) pair during part of their elaborate courtship called the 'weed dance', Derbyshire, UK, March

Andrew Parkinson / Great crested grebe (Podiceps cristatus) pair during their elaborate courtship dance, Derbyshire, UK, March

Andrew Parkinson / Great crested grebe (Podiceps cristatus) stretching its wings and neck in dawn light, Derbyshire, UK, March

Andrew Parkinson / Great crested grebe (Podiceps cristatus) pair during their elaborate courtship dance, Derbyshire, UK, March

Juan Carlos Munoz / Comb crested dragon lizard {Gonocephalus liogaster} on Strangler fig roots, Danum valley forest reserve, Sabah, Borneo, Malaysia

Nick Garbutt / Bornean angle-headed lizard (Gonocephalus bornensis) with mouth open in forest habitat, Danum Valley, Sabah, Borneo, Malaysia

Thomas Marent / Cotton-top Tamarin (Saguinus oedipus) in tree, northern Colombia

Hanne & Jens Eriksen / Lesser crested tern {Thalasseus bengalensis} flock on beach, large gulls and waves in background, Socotra, Yemen

Fabio Liverani / Crested newt {Triturus cristatus carnifex} male in breeding colours, Parco Delta del Po, NE Italy captive 2008

Fabio Liverani / Crested newt {Triturus cristatus carnifex} male in breeding colours, Parco Delta del Po, NE Italy captive 2008

Edwin Giesbers / Double crested basilisk / Green basilisk lizard (Basiliscus plumifrons), Costa Rica

Michel Poinsignon / Great crested grebe (Podiceps cristatus) returning to eggs on nest with chicks on back, Lorraine, France

Jose B. Ruiz / Great crested grebe {Podiceps cristatus} amongst water vegetation, Los Barruecos NP, Malpartida de Caceres, Extremadura, Spain

Rolf Nussbaumer / Crested Tit {Lophophanes cristatus} adult on frozen branch in winter, minus 15 Celsius, Switzerland

Tim Fitzharris / Double-crested Cormorant (Phalacrocorax auritus) drying its wings, North America

Rolf Nussbaumer / Common / Crested Caracara (Caracara plancus) calling, Willacy County, Rio Grande Valley, Texas, USA. May 2004

S. Zankl / Male Great / Northern Crested Newt, (Triturus cristatus) in frogspawn, Germany

S. Zankl / High angle shot of male Great / Northern crested newt (Triturus cristatus) in water, Germany

Patricio Robles Gil / Fiji Crested Iguana (Brachylophus vitiensis) beside Heliconia, endemic to Fiji and Tonga

Tim Fitzharris / Stand of conifers in the Elk Mountains near Crested Butte, Colorado

Simon Colmer / Great crested newt (Triturus cristatus) juvenile underwater, captive

Peter Blackwell / Back view of Crested porcupine {Hystrix cristata} walking away, Central Kenya

Rod Williams / Celebes / Black / Sulawesi crested macaque {Macaca nigrai} female with infant. Captive.

WILLIAM OSBORN / Sulphur crested cockatoo {Cacatua galerita} Queensland, Australia

Solvin Zankl / Celebes / Black / Sulawesi crested macaque (black ape) {Macaca nigra} in rainforest. Sulawesi, Indonesia

WILLIAM OSBORN / Crested pigeon male displays to female {Ocyphaps lophotes} Queensland, Australia

WILLIAM OSBORN / Crested pigeon male displays to female {Ocyphaps lophotes} Queensland, Australia

WILLIAM OSBORN / Crested pigeon male display to female {Ocyphaps lophotes} Queensland, Australia

WILLIAM OSBORN / Crested pigeon {Ocyphaps lophotes} Queensland, Australia

WILLIAM OSBORN / Sulphur crested cockatoo {Cacatua galerita} feeding from foot, QLD, Australia