Daniel Brockner/ BIA / Crimson-rumped Toucanet (Aulacorhynchus haematopygus), Mindo, Ecuador

Jed Weingarten / Wild Wonders of China / Temminck's tragopan (Tragopan temminckii) Tangjiahe Nature Reserve, Sichuan province, China.

Greg Oakley / Crimson Rosella (Platycercus elegans) with juvenile, Victoria, Australia

Greg Oakley / Crimson Rosella (Platycercus elegans) male, Victoria, Australia

Tui De Roy / Crimson-rumped Toucanet (Aulacorhynchus haematopygus), Angel Paz Reserve, Andes, Ecuador

Tui De Roy / Crimson-rumped Toucanet (Aulacorhynchus haematopygus), Bellavista Cloud Forest Reserve, Tandayapa Valley, Andes, Ecuador

Alex Mustard / World War II British motorbikes (Norton 16H) stacked up on the back of truck in the hold of wreck of HMS Thistlegorm, with soldierfish (Myripristis murdjan) swimming above. Sha'ab Ali, Sinai, Egypt. R...

Alex Mustard / World War II British motorbikes (Norton 16H) stacked up on the back of truck in the hold of wreck of HMS Thistlegorm, with Soldierfish (Myripristis murdjan) swimming above. Sha'ab Ali, Sinai, Egypt. R...

Hermann Brehm / Crimson breasted shrike / Burchell's gonolek (Laniarius atrococcineus) Namibia

Tui De Roy / Crimson-rumped Toucanet (Aulacorhynchus haematopygus) eating fruit at feeding station, Bellavista Cloud Forest Reserve, Ecuador

Thomas Marent / Crimson-patched Longwing (Heliconius erato) butterfly, Colombia

Nigel Bean / Crimson Waxcap {Hygrocybe punicea} growing in grasslands, Ashton Court, Bristol, UK.

Claus Meyer / Crimson-bellied Parakeet (Pyrrhura perlata) portrait, Amazon ecosystem, Brazil

Geoff Simpson / Dog rose flower {Rosa canina} Derbyshire Dales, UK

Ann & Steve Toon / Blue waxbills (Uraeginthus angolensi) and redbilled firefinches (Lagonosticta senegala) at water, Zimanga private game reserve, KwaZulu-Natal, South Africa.

Ann & Steve Toon / Red-billed firefinch (Lagonosticta senegala), Zimanga private game reserve, KwaZulu-Natal, South Africa.

Ann & Steve Toon / Red-billed firefinch (Lagonosticta senegala), Zimanga private game reserve, KwaZulu-Natal, South Africa.

Staffan Widstrand / Wild Wonders of China / Temminck's tragopan pheasant (Tragopan temminckii) male, Chongqing region, Sichuan, China

Alex Mustard / A British World War II Ford (Fordson) WOT3 truck inside the lower level of the hold (hold 2, port side) of the SS Thistlegorm wreck, with Red Sea soldierfish (Myripristis murdjan). Sha'ab Ali, Sin...

Martin Willis / Crimson Finch (Neochmia phaeton) male, Kimberley, Western Australia, Australia

Cyril Ruoso / Crimson clover (Trifolium incarnatum), grown as green manure. Yonne, Bourgogne-Franche-Comte, France. April.

Heather Angel / Scarlet monkey flower (Mimulus cardinalis). The high position of the stamens and stigma ensure that the heads of hummingbird pollinators make contact with them whilst nectaring. Cultivated in garden,...

John Shaw / Crimson-crested woodpecker (Campephilus melanoleucos) at nest cavilty in dead tree. Pantanal, Brazil. July.

John Shaw / Crimson-rumped toucanet (Aulacorhynchus haematopygus) perched, Ecuador, May.

Bernard Castelein / Crimson-crested Woodpecker (Campephilus melanoleucos), male, perched on trunk, Municipal protected area of Pampas del Yacuma, Bolivia

Bernard Castelein / Crimson-crested Woodpecker (Campephilus melanoleucos), male, Pampas del Yacuma Protected Area, Bolivia

David Pattyn / Crimson rumped toucanet (Aulacorhynchus haematopygus) Mindo, Pichincha, Ecuador, July

David Gallan / Crimson rosella (Platycercus elegans) feeding, New South Wales, Australia, May.

Richard Du Toit / Crimson-breasted Gonolek (Laniarius atrococcineus), Kgalagadi Transfrontier Park, South Africa

Jed Weingarten / Wild Wonders of China / Temminck's tragopan (Tragopan temminckii) with waterfall, Tangjiahe Nature Reserve, Sichuan province, China.

Jed Weingarten / Wild Wonders of China / Temminck's tragopans (Tragopan temminckii) fighting, Tangjiahe Nature Reserve, Sichuan province, China.

Jed Weingarten / Wild Wonders of China / Temminck's tragopans (Tragopan temminckii) fighting, Tangjiahe Nature Reserve, Sichuan province, China.

Jed Weingarten / Wild Wonders of China / Temminck's tragopans (Tragopan temminckii) fighting, Tangjiahe Nature Reserve, Sichuan province, China.

Jed Weingarten / Wild Wonders of China / Temminck's tragopan (Tragopan temminckii) Tangjiahe Nature Reserve, Sichuan province, China.

Thomas Marent / Crimson-rumped Toucanet (Aulacorhynchus haematopygus), Valle del Cauca, Colombia

Thomas Marent / Crimson-rumped Toucanet (Aulacorhynchus haematopygus), Valle del Cauca, Colombia

Thomas Marent / Crimson-rumped Toucanet (Aulacorhynchus haematopygus), Valle del Cauca, Colombia

Thomas Marent / Crimson-rumped Toucanet (Aulacorhynchus haematopygus), Valle del Cauca, Colombia

Thomas Marent / Crimson-rumped Toucanet (Aulacorhynchus haematopygus) pair, Valle del Cauca, Colombia

Steven David Miller / Crimson rosella (Platycercus elegans) juvenile perched in tree. Grampians National Park, Victoria, Australia.

Steven David Miller / Crimson rosella (Platycercus elegans) juvenile perched in tree. Yarra Ranges, Victoria, Australia.

Steven David Miller / Crimson rosella (Platycercus elegans) juvenile perched in tree. Yarra Ranges, Victoria, Australia.

Steven David Miller / Crimson rosella (Platycercus elegans) juvenile perched on branch. Grampians National Park, Victoria, Australia.

Graeme Guy/ BIA / Crimson Rosella (Platycercus elegans) feeding on flowers, Queensland, Australia

David Perpinan / Two Crimson-crested woodpeckers (Campephilus melanoleucus) in tree at sunset, Pantanal, Mato Grosso do Sul, Brazil.

Magnus Lundgren / Wild Wonders of China / Temminck's tragopan (Tragopan temminckii) male on a stone , Tangjiahe National Nature Reserve, Sichuan Province, China

Magnus Lundgren / Wild Wonders of China / Temminck's tragopans (Tragopan temminckii ) males fighting on a stone near a waterfall, Tangjiahe National Nature Reserve, Sichuan Province, China

Magnus Lundgren / Wild Wonders of China / Temminck's tragopans (Tragopan temminckii ) males fighting on a stone near a waterfall, Tangjiahe National Nature Reserve, Sichuan Province, China

Magnus Lundgren / Wild Wonders of China / Temminck's tragopans (Tragopan temminckii ) males fighting on a stone near a waterfall, Tangjiahe National Nature Reserve, Sichuan Province, China

Magnus Lundgren / Wild Wonders of China / Temminck's tragopan (Tragopan temminckii) male on a stone , Tangjiahe National Nature Reserve, Sichuan Province, China

Staffan Widstrand / Wild Wonders of China / Temminck's tragopan (Tragopan temminckii) male bird walking throught the forest of Tangjiahe National Nature Reserve, Qingchuan County, Sichuan province, China

Staffan Widstrand / Wild Wonders of China / Temminck's tragopan (Tragopan temminckii) male bird walking throught the forest of Tangjiahe National Nature Reserve, Qingchuan County, Sichuan province, China

Staffan Widstrand / Wild Wonders of China / Temminck's tragopan (Tragopan temminckii) male bird walking throught the forest of Tangjiahe National Nature Reserve, Qingchuan County, Sichuan province, China

Staffan Widstrand / Wild Wonders of China / Temminck's tragopan (Tragopan temminckii) male bird walking throught the forest of Tangjiahe National Nature Reserve, Qingchuan County, Sichuan province, China

Staffan Widstrand / Wild Wonders of China / Temminck's tragopan (Tragopan temminckii) male bird walking throught the forest of Tangjiahe National Nature Reserve, Qingchuan County, Sichuan province, China

Staffan Widstrand / Wild Wonders of China / Temminck's tragopan (Tragopan temminckii) male bird walking throught the forest of Tangjiahe National Nature Reserve, Qingchuan County, Sichuan province, China

Staffan Widstrand / Wild Wonders of China / Temminck's tragopan (Tragopan temminckii) male bird walking throught the forest of Tangjiahe National Nature Reserve, Qingchuan County, Sichuan province, China

Staffan Widstrand / Wild Wonders of China / Temminck's tragopan (Tragopan temminckii) male bird walking throught the forest of Tangjiahe National Nature Reserve, Qingchuan County, Sichuan province, China

Staffan Widstrand / Wild Wonders of China / Temminck's tragopan (Tragopan temminckii) male bird walking throught the forest of Tangjiahe National Nature Reserve, Qingchuan County, Sichuan province, China

Staffan Widstrand / Wild Wonders of China / Temminck's tragopan (Tragopan temminckii) male bird walking throught the forest of Tangjiahe National Nature Reserve, Qingchuan County, Sichuan province, China

Staffan Widstrand / Wild Wonders of China / Temminck's tragopan (Tragopan temminckii) male bird walking throught the forest of Tangjiahe National Nature Reserve, Qingchuan County, Sichuan province, China

Staffan Widstrand / Wild Wonders of China / Temminck's tragopan (Tragopan temminckii) male bird walking throught the forest of Tangjiahe National Nature Reserve, Qingchuan County, Sichuan province, China

Staffan Widstrand / Wild Wonders of China / Temminck's tragopan (Tragopan temminckii) male bird walking throught the forest of Tangjiahe National Nature Reserve, Qingchuan County, Sichuan province, China

Staffan Widstrand / Wild Wonders of China / Temminck's tragopan (Tragopan temminckii) female bird walking throught the forest of Tangjiahe National Nature Reserve, Qingchuan County, Sichuan province, China

Staffan Widstrand / Wild Wonders of China / Temminck's tragopan (Tragopan temminckii) male bird walking throught the forest of Tangjiahe National Nature Reserve, Qingchuan County, Sichuan province, China

Staffan Widstrand / Wild Wonders of China / Temminck's tragopan (Tragopan temminckii) male bird walking throught the forest of Tangjiahe National Nature Reserve, Qingchuan County, Sichuan province, China

Staffan Widstrand / Wild Wonders of China / Temminck's tragopan (Tragopan temminckii) male bird walking throught the forest of Tangjiahe National Nature Reserve, Qingchuan County, Sichuan province, China

Staffan Widstrand / Wild Wonders of China / Red-faced liocichla (Liocichla phoenicea) bird perched on a branch in Baihualing, Gaoligongshan, Yunnan, China

Ann & Steve Toon / Crimson-breasted shrike (Laniarius atrococcineus) following foraging Meerkat (Suricata suricatta) Kgalagadi Transfrontier Park, South Africa.

Robin Chittenden / Crimson marsh glider (Trithemis aurora), Phuket, Thailand.

Rod Williams / Red or Small postman (Heliconius erato) feeding on milkweed, Central and South America.

Linda Pitkin / Blotcheye soldierfish (Myripristis murdjan) by wreck of The Barge, near Bluff Point, Gubal I., Gulf of Suez, Egypt, Red Sea.

Konrad Wothe / Crimson-rumped Toucanet (Aulacorhynchus haematopygus), northwest Ecuador

Murray Cooper / Crimson-mantled Woodpecker (Colaptes rivolii), South America

Alex Mustard / Shoal of a Red Sea soldierfish (Myripristis murdjan) and Sixbar grouper (Cephalopholis sexmaculata) shelter in a coral filled cave. Ras Mohammed National Park, Sinai, Egypt. Red Sea.

Lucas Bustamante / Crimson rumped toucanet (Aulacorhynchus haematopygus) feeding in tree, Mindo, Pichincha, Ecuador.

Martin Willis / Crimson Chat (Epthianura tricolor) male in flowers, Cue, Western Australia, Australia

Martin Willis / Crimson Chat (Epthianura tricolor) male, Cue, Western Australia, Australia

Martin Willis / Crimson Chat (Epthianura tricolor) male with insect prey, Cue, Western Australia, Australia

Ernie Janes / Crimson flag lily (Schizostylis coccinea) 'Major' in autumn, Norfolk, England, UK, September.

Phil Savoie / Crimson fronted parrot (Aratinga finschi) La Selva Field Station, Costa Rica.

Phil Savoie / Crimson fronted parrot (Aratinga finschi) La Selva Field Station, Costa Rica.

Lucas Bustamante / Crimson-rumped toucanet (Aulacorhynchus haematopygus) calling, Mashpi, Pichincha, Ecuador.

Angelo Gandolfi / Red postman butterfly (Heliconius erato) (above) and Tiger longwing (Heliconius hecale) La Paz Waterfall Gardens, Costa Rica.

Franco Banfi / Detail of the mouth of Crimson anemone (Cribrinopsis fernaldi) Vancouver Island, British Columbia, Canada, Pacific Ocean

Rod Williams / Purple-and-gold micro-moth (Pyrausta purpuralis) Brockley, Lewisham, South East London, England, UK, August.

Konrad Wothe / Crimson-crested woodpecker (Campephilus melanoleucos) drumming and preening, Panguana Reserve, Huanuca Region, Peru.

Hanne & Jens Eriksen / Crimson speckled moth (Utetheisa pulchella) adult with caterpillar in the background, Oman, March

Franco Banfi / Candy-striped shrimp (Lebbeus grandimanus) on Crimson anemone (Cribrinopsis fernaldi), Alaska, United States, North Pacific Ocean.

Franco Banfi / Candy-striped shrimp (Lebbeus grandimanus) on Crimson anemone (Cribrinopsis fernaldi), Alaska, United States, North Pacific Ocean.

Konrad Wothe / Showreel of various wildlife in a rainforest, including Brilliant-thighed poison-arrow frog (Allobates femoralis), Army ants (Eciton burcellii), Nauta salamander (Bolitoglossa altamazonica), Band-tail...

Konrad Wothe / Crimson crested woodpecker (Campephilus melanoleucos) preening and drumming, Panguana Reserve, Huanuca Province, Peru.

Nick Hawkins / Small postman butterfly (Heliconius erato) photographed on white background, Costa Rica.

Oriol Alamany / Crimson Rosella (Platycercus elegans elegans) in Green Mountains rainforest, Lamington National Park, Rainforests of Australia UNESCO World Heritage Site, Queensland, Australia

Thomas Marent / Crimson-backed Tanager (Ramphocelus dimidiatus) male, Guacharo Cave National Park, Colombia

Thomas Marent / Crimson-backed Tanager (Ramphocelus dimidiatus) female, Guacharo Cave National Park, Colombia