Gabriel Rojo / Elegant crested tinamou {Eudromia elegans} La Pampa, Argentina

Tom Vezo / Crested Auklet {Aethia cristatella} portrait on a rock, Alaska. Saint Paul Island

Kim Taylor / Great crested newt tadpole {Triturus cristatus} UK.

Pete Oxford / Crested toads on leaf litter {Bufo typhonius}, Amazon, Ecuador Captive

Pete Oxford / Red-crested Cardinal (Paroaria coronata) perched on branch, Pantanal, Brazil

Rolf Nussbaumer / Brown crested flycatcher {Myiarchus tyrannulus} with butterfly prey, Texas, USA.

Rolf Nussbaumer / Brown crested flycatcher {Myiarchus tyrannulus} with insect prey, Texas, USA.

Tui De Roy / Erect-crested Penguin (Eudyptes sciateri) pair, Antipodes Island, New Zealand

Tui De Roy / Erect-crested Penguin (Eudyptes sciateri) close-up portrait, restricted to Proclamation Island, Bounty Islands, New Zealand

Rolf Nussbaumer / Crested lark singing {Galerida cristata} Samos, Greece.

Rolf Nussbaumer / Crested tit {Lophophanes cristatus} Switzerland.

Rolf Nussbaumer / Black crested titmouse flying {Baeolophus bicolor atricristatus} Texas, USA.

Claus Meyer / Cotton-top Tamarin (Saguinus oedipus), Colombia

Gerry Ellis / Sulphur-crested Cockatoo (Cacatua galerita) perching on branch, New Guinea

Tui De Roy / Fiordland Crested Penguin (Eudyptes pachyrhynchus) courting couple allopreening each other, Monroe Beach, West Coast, South Island, New Zealand

Jose B. Ruiz / Crested tit flies to nest hole {Lophophanes cristatus} Spain

Hugh Pearson / Snares island penguin, dispute {Eudyptes robustus} Snares Island, New Zealand

Paul Hobson / Great crested newt male in pond, South Yorkshire, UK

Mike Wilkes / Great Crested Grebe on nest in water. England

Pete Oxford / Crested eagle chick on nest exercising wings {Morphnus guianensis} Amazon rainforest. Peru, South America.

Pete Oxford / Crested eagle female feeding juvenile feeding on nest {Morphnus guianensis} Amazonia, Peru

Hans Christoph Kappel / Common (Crested) Caracara (Caracara plancus). Pantanal, Brazil, South America

Hans Christoph Kappel / Common (Crested) Caracara (Caracara plancus) in flight. Pantanal, Brazil, South America

Paul Hobson / Crested newt male breeding coloration {Triturus vulgaris} Yorkshire, UK

Pete Oxford / Crested eagle juvenile on nest {Morphnus guianensis} Amazonia, Peru

Geoff Simpson / Crested tit {Lophophanes cristatus} winter Scotland

John Cancalosi / Crested newt, breeding male, UK

Pete Cairns / Crested tit {Lophophanes cristatus} Strathspey, Scotland, UK

Mike Read / Red crested pochard duck male {Netta ruffina} Arundel, Sussex, UK

Mike Wilkes / Great Crested Grebe displaying on nest (Podiceps cristatus) UK

Mark Yates / Great crested newt (Triturus cristatus)

Richard Du Toit / Crested Guineafowl (Guttera pucherani) partially hidden by vegetation, Limpopo Province, South Africa, October

Piotr Naskrecki / Crested Forest Toad (Bufo margaritifer)on rainforest floor, Suriname

Piotr Naskrecki / Crested Forest Toad (Bufo margaritifer), Suriname

Hermann Brehm / Plush-crested Jay (Cyanocorax chrysops), Mato Grosso do sul, Brazil

Hermann Brehm / Plush-crested Jay (Cyanocorax chrysops), Mato Grosso do sul, Brazil

Hermann Brehm / Plush-crested Jay (Cyanocorax chrysops), Mato Grosso do sul, Brazil

Hermann Brehm / Plush-crested Jay (Cyanocorax chrysops), Mato Grosso do sul, Brazil

Juan Manuel Borrero / Illustration of threatened species of birds of Spain. Iberian Guillemot (Uria aalge ibericus), Cantabrian capercallie (Tetrao urogallus cantabricus), White backed woodpecker (Dendrocopos leucotos), Be...

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) female feeding on leaf shoots, 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) juvenile head and shoulders portrait, Tangkoko National Park, Sulawesi, Indonesia.

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

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

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

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) female cradling her baby son aged less than 1 month, Tangkoko National Park, Sulawesi, Indonesia.

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) 'alpha' baby female aged about 1 month sitting in a tree, Tangkoko National Park, Sulawesi, Indonesia.

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

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) juvenile feeding on coconut husk, Tangkoko National Park, Sulawesi, Indonesia.

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) mature male sitting on the forest floor, Tangkoko National Park, Sulawesi, Indonesia.

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

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) adolescent male feeding on fruit, 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 and shoulders portrait, Tangkoko National Park, Sulawesi, Indonesia.

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) mature male head 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) sub-adult male feeding on a coconut, Tangkoko National Park, Sulawesi, Indonesia.

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

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) mature male grimacing at a female, Tangkoko National Park, Sulawesi, Indonesia.

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) female feeding on leaf shoots, Tangkoko National Park, Sulawesi, Indonesia.

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) mature 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) mature male feeding on drift wood for the salt, Tangkoko National Park, Sulawesi, Indonesia.

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) mature male feeding on drift wood for the salt, Tangkoko National Park, Sulawesi, Indonesia.

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) mature male feeding on drift wood for the salt, Tangkoko National Park, Sulawesi, Indonesia.

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) 'Alpha' baby female aged about 1 month sitting playfully with her mother, Tangkoko National Park, Sulawesi, Indonesia.

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

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) female with her suckling baby aged less than 1 month, Tangkoko National Park, Sulawesi, Indonesia.

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) female baby aged less than 1 month playing with a juvenile, Tangkoko National Park, Sulawesi, Indonesia.

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) mature male sitting in a tree, Tangkoko National Park, Sulawesi, Indonesia.

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

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) baby aged less than 1 month playing in a tree, Tangkoko National Park, Sulawesi, Indonesia.

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

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

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) male baby aged less than 1 month sitting in a tree, Tangkoko National Park, Sulawesi, Indonesia.

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

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) female baby aged less than 1 month sitting on the forest floor with her mother, Tangkoko National Park, Sulawesi, Indonesia.

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) juvenile feeding on leaves, Tangkoko National Park, Sulawesi, Indonesia.

Fiona Rogers / 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.

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) baby aged less than 1 month playing in a tree, 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 aged less than 1 month venturing away from its mother, Tangkoko National Park, Sulawesi, Indonesia.

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) baby aged less than 1 month 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 aged less than 1 month portrait, Tangkoko National Park, Sulawesi, Indonesia.

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

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

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) rear view of mature male bottom, Tangkoko National Park, Sulawesi, Indonesia.

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) juvenile male wet from rain, Tangkoko National Park, Sulawesi, Indonesia.

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) juveniles play fighting, 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) baby aged less than 1 month sitting in its mother's arms, Tangkoko National Park, Sulawesi, Indonesia.

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) baby aged less than 1 month sitting with its mother, Tangkoko National Park, Sulawesi, Indonesia.

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