Alex Mustard / 2020VISION / Male Common cuttlefish (Sepia officinalis) in striped breeding colouration, guarding a female as she lays eggs within the seaweeds. Babbacombe Bay, Torbay, Devon, UK, May spawning period. Did you know...

Juergen Freund / Ambon scorpionfish (Pteroidichthys amboinensis) and similar-looking weed. This scorpionfish can change its colour for the best camouflage. Lembeh Strait, North Sulawesi, Indonesia.

Andy Sands / Stoat (Mustela erminea) in white winter ermine coat, captive, UK. British stoats rarely assume full winter ermine coast. This animal originated from Teesdale, County Durham.

Alex Hyde / Panther chameleon male in threat display {Furcifer pardalis} Madagascar.

Alex Hyde / Panther chameleon male in threat display {Furcifer pardalis}, Madagascar.

Alex Hyde / Panther chameleon close-up of skin {Furcifer pardalis} red / yellow / green colouration, Madagascar.

Alex Hyde / Panther chameleon close-up of skin {Furcifer pardalis} red / blue / green colouration, Madagascar.

Alex Hyde / Panther chameleon close-up of skin {Furcifer pardalis} red colouration, Madagascar.

Alex Hyde / Close up of skin of Parson's chameleon {Calumma parsonii} showing scales and dark brown colouration. Tropical rainforest, Masoala Peninsula National Park, north east Madagascar.

Michael D. Kern / Green tree python (Morelia / Chondopython viridis) juvenile coiled on branch, captive, from Australia and SE Asia

GEORGETTE DOUWMA / Longface emperor (Lethrinus olivaceus) able to change pattern and colour which makes for very effective camouflage. Andaman Sea, Thailand.

Georgette Douwma / Giant frogfish (Antennarius commerson) camouflaged against coral reef, able to change colour and shape, Rinca, Komodo National Park, Indonesia

GEORGETTE DOUWMA / Longface emperor (Lethrinus olivaceus) able to change pattern and colour which makes for very effective camouflage. Andaman Sea, Thailand.

Stephen Dalton / Panther chameleon (Chamaeleo / Furcifer pardalis) with insect prey, controlled conditions

Philippe Clement / Japanese maple leaves (Acer palmatum) in autumn colours, native to Japan and Korea

Philippe Clement / Paper / American white / Canoe birch (Betula papyrifera) leaves in autumn colours showing colour change, native to northern North America

Philippe Clement / Silver / Creek / River maple (Acer saccharinum) leaf in autumn colours, native to eastern North America

Philippe Clement / American Sweetgum / Redgum (Liquidambar styraciflua) leaves in autumn colours, native to North America

Inaki Relanzon / Panther chameleon (Furcifer / Chamaeleo pardalis) showing colour change, Sambava, North-east Madagascar.

Bernard Castelein / Southern plains grey / Hanuman langur {Semnopithecus dussumieri} family group on rock, Rajasthan, India

GEORGETTE DOUWMA / Two Elongate surgeonfish (Acanthurus mata) with Bluestreak cleaner wrasses, showing the colour changes the fish can go through during cleaning. Sweepers in background. Andaman Sea, Thailand.

GEORGETTE DOUWMA / Big-eye or Goggle-eye (Priacanthus hamrur). Can change colour from deep red to silver. Egypt, Red Sea

GEORGETTE DOUWMA / Bluespine unicornfish (Nasi unicornis) school with fish showing colour changes. Egypt, Red Sea.

GEORGETTE DOUWMA / Big-eye / Goggle-eye (Priacanthus hamrur). Can change colour from deep red to silver. Egypt, Red Sea

Georgette Douwma / Bluespine surgeonfish (Naso unicornis) school. These fish can rapidly change colour, Rinca, Indonesia

David Shale / Deepsea squid {Histioteuthis bonellii} showing chromatophores changing colour, from the Mid-Atlantic Ridge, 200 - 50m

Andrew Parkinson / Mountain hare {Lepus timidus} adult on snow, coat changing from summer brown to winter white. Monadhliath Mountains, Scotland, UK

Nick Garbutt / Snub nosed chameleon {Chamaeleo labordi} female on branch, Kirindy forest, Madagascar. Colour change sequence 1.

Nick Garbutt / Snub nosed chameleon {Chamaeleo labordi} female, Madagascar. Colour change sequence 2.

Chris O'Reilly / Red oak {Quercus rubra} close-up of leaf showing autumn colour change, UK, Sequence 1/3

Chris O'Reilly / Red oak {Quercus rubra} close-up of leaf showing autumn colour change, UK, Sequence 2/3

Matthew Maran / Silvered Langur {Trachypithecus cristatus / Presbytis cristata} mother with young, Bako National Park, Sarawak, Malaysia, Orange coat of young Silvered langur changes to silver within 3 to 5 months.

Constantinos Petrinos / Common reef octopus colour change (Octopus cyaneus) Sulawesi, Indonesia

Fred Bavendam / Reef Octopus (Octopus cyanea) exhibiting color change, Gili Islands, Indonesia Sequence 1 of 2

Barrie Britton / Panther chameleon, stripy blue sub species (Chamaeleo pardalis) Nosy Tanikely Island, North West Madagascar

Jean E. Roche / Blue form Pool frog (very rare) {Rana lessonae} Camargue, France, Europe

Barrie Britton / Panther chameleon, red sub species (Chamaeleo pardelis) colour is where one male displays to another male, captive

Will Watson / Common european toad {Bufo bufo} juvenile with red colour aberration, UK

Steven David Miller / Snowy egret portrait, pink lores of breeding plumage {Egretta egret} Florida, USA

David Welling / Autumn fall colours by pond in Eastern Sierras, California, USA

David Welling / Autumn fall colours in mixed woodland, USA

LYNN M. STONE / Tundra landscape in autumn, Denali NP, Alaska

Doug Perrine / Two colour phases of Goggle eye fish {Priacanthus hamrur} Sipadan, Sabah, Borneo, Malaysia

Tony Heald / Male Agama lizard {Agama atriocollis} on tree bark, very colourful in breeding season. Kruger NP, South Africa

Chris Gomersall / European beech trees in woodland {Fagus sylvatica} Ashridge Forest, Hertfordshire, UK

Chris Gomersall / European beech trees in woodland {Fagus sylvatica} Ashridge Forest, Hertfordshire, UK

Brian Lightfoot / Autumn colours in Glen Lethnot near Montrose, Scotland, UK

Larry Michael / Leaves beginning to change colour in Autumn, Wisconsin, USA

Chris O'Reilly / Close up of leaf of Sugar maple {Acer saccharum} showing colour change in autumn, Derbyshire, UK

Chris O'Reilly / Arctic fox {Vulpes lagopus} female in transitional summer coat, captive, Scotland, UK

Pete Oxford / Parson's Chameleon {Chamaeleo parsonii} male on branch, La Madraka Farm, Madagascar. Showing colour change from 1039818

GEORGETTE DOUWMA / Painted anglerfish (Antennarius pictus) with white skin colour, Lembeh Strait, North Sulawesi, Indonesia.

GEORGETTE DOUWMA / Painted frogfish (Antennarius pictus) juvenile with white skin colour, Lembeh Strait, North Sulawesi, Indonesia

GEORGETTE DOUWMA / Painted anglerfish (Antennarius pictus) with yellow skin colour, Lembeh Strait, North Sulawesi, Indonesia.

GEORGETTE DOUWMA / Painted anglerfish (Antennarius pictus) with pink skin colour, Lembeh Strait, North Sulawesi, Indonesia.

Fabio Liverani / Italian treefrog {Hyla intermedia} Blue colour due to metabolism change. Italy

Fabio Liverani / Italian treefrog {Hyla intermedia} Blue colour due to metabolism change. Italy

Fabio Liverani / Italian treefrog {Hyla intermedia} Blue colour due to metabolism change. Italy

Fabio Liverani / Italian treefrog {Hyla intermedia} Blue colour due to metabolism change. Italy

Fabio Liverani / Italian treefrog {Hyla intermedia} Blue colour due to metabolism change. Italy

Doug Perrine / Common reef octopus {Octopus cyaneus} colour change sequence 2/2. Maldives

Doug Perrine / Common reef octopus {Octopus cyaneus} colour change sequence 1/2. Maldives

John Downer / Japanese maple leaves in autumn {Acer japonicum} Westonbirt Arboretum, Gloucestershire, UK

Jorma Luhta / Rock ptarmigan in landscape showing colour change, Lapland, Finland {Lagopus mutus}

Jorma Luhta / Rock ptarmigan showing colour change {Lagopus mutus} Finland

Jorma Luhta / Rock ptarmigan showing colour change {Lagopus mutus} Finland

Jose B. Ruiz / Peacock blenny showing colour change {Blennius / Lipophrys pavo} Mediterranean

Niall Benvie / Rock ptarmigan plumage colour change {Lagopus mutus} Scotland

Niall Benvie / Rock ptarmigan plumage colour change {Lagopus mutus} Scotland

Jeff Rotman / Flounder close up - face change (Pleuronectidae) MA, USA

Constantinos Petrinos / Broadclub cuttlefish {Sepia latimanus} deimatic display, defence, gives illusion of

Pete Oxford / Parson's chameleon male portrait. Madagascar. Showing colour change from 1039817

Jeff Rotman / Common Atlantic octopus {Octopus vulgaris) changes colour to camouflage itself. Sequence 1/3. North Atlantic Ocean

Jeff Rotman / Common Atlantic octopus {Octopus vulgaris} changes from white to red, sequence 2 of 3. Atlantic

GEORGETTE DOUWMA / Bleached Magnificent sea anemone {Heteractis magnifica} + Anemone fish. {Amphiprion nigrippes} Maldives - loss of algae from anemone tissues results in bleaching

Constantinos Petrinos / Pacific blue ring octopus {Octopus maculosa / lunulata} note enlarged blue rings of agitated animal; toxic species. Lembeh, Sulawesi, Indonesia. Colour change Sequence.

Constantinos Petrinos / Pacific blue ring octopus {Octopus maculosa / lunulata} has blue rings that enlarge when agitated; toxic species. Sulawesi, Indonesia. Colour change Sequence.

Jeff Rotman / Common Atlantic Octopus {Octopus vulgaris} changes colour from white to red Sequence 3/3. New England, USA

Fred Bavendam / Reef Octopus (Octopus cyanea) exhibiting color change, Gili Islands, Indonesia Sequence 1 of 2

Constantinos Petrinos / Broadclub cuttlefish colour change {Sepia latimanus} Sulawesi, Indonesia

GEORGETTE DOUWMA / Bluespine unicornfish {Naso unicornis} showing colour change Red Sea

David Shale / Spiny reed frog white in sunlight {Afrixalus fornasinii} Arabuko Sokoke forest Kenya

Doug Perrine / Hawaiian long-armed sand octopus (Thaumoctopus, Abdopus, or Macrotritopus sp.) unidentified species possibly endemic to Hawaii, pair displaying mating behaviour, dark maroon colour pattern around eyes...

Andy Sands / Slime mould (Stemonitopsis typhina) recently developed 2mm tall sporangia starting to change colour as they mature, Buckinghamshire, England, UK. July. Focus stacked.

Andy Sands / RF - Slime mould (Stemonitis flavogenita) with sporangia having developed around 3 hours ago showing colour change from original yellow colour, Hertfordshire, England, UK. May. Focus stacked. (This im...

Andy Sands / Slime mould (Stemonitis flavogenita) sporangia showing the colour change from original yellow colour, Hertfordshire, England, UK. May. Focus stacked. Taken 12 hours after picture 2. Sequence 3 of 4.

Andy Sands / Slime mould (Stemonitis flavogenita) sporangia showing the change in colour change from yellow, Hertfordshire, England, UK. May. Focus stacked. Taken 6 hours after picture 1. Sequence 2 of 4.

Jack Perks / Ballan wrasse (Labrus bergylta) adult entering frame, investigating cave entrance, changing colour through metachrosis and leaving frame, Swanage Pier, Dorset, England, UK, English Channel, September.

Andy Rouse / Austfonna polar ice cap, Svalbard, Norway, Arctic Ocean. September, 2023.

Andy Rouse / Waterfalls blowing upwards in strong winds on the Austfonna Polar Ice Cap, Svalbard, Norway, Arctic Ocean. September, 2023.

Andy Rouse / RF - Waterfall caused by melt water, Austfonna Polar Ice Cap, Svalbard, Norway, Arctic Ocean. September, 2023. (This image may be licensed either as rights managed or royalty free.)

Andy Rouse / RF - Waterfall caused by melt water, Austfonna Polar Ice Cap, Svalbard, Norway, Arctic Ocean. September, 2023. (This image may be licensed either as rights managed or royalty free.)