Colin Varndell / English oak (Quercus robur) ripening acorns, Dorset, UK September.

Solvin Zankl / Mating behaviour in Common fruit flies (Drosophila melanogaster) studied in laboratory for gene research, a Curly (wings turn up) and Orange (less red pigment in the eyes) mutant female rejects the ma...

Solvin Zankl / Mating behaviour in Common fruit flies (Drosophila melanogaster) studied in laboratory for gene research, a Yellow (body pigmentation) Curly (wings turn up) type mutant male mates with a Yellow, Curly...

Alex Hyde / Red algae living just below the surface of snow, known as 'Red Snow'. The red pigment provides protection from ultra-violet light. Austrian Alps, 2800 metres above sea level, June 2009.

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 / Papua New Guinean artist with the natural pigment he uses when carving Malagan wooden sculptures, the ceremonial art of New Ireland's living culture. The black pigment is made from a fruit of a Kalapu...

Adrian Davies / Golden Silk Spider (Nephila clavipes) female on web, Everglades, Florida, USA. December Note yellow pigment in web to attract small bees

John Cancalosi / Barite (BaS04) on Cerrusite Mibladen Morocco Barite (orange) is the major ore of barium (barium sulfate) - Mineral class: sulfates - Barite is an important commercial mineral - Widely used as a pigmen...

Colin Varndell / Dunnock (Prunella modularis) showing white pigment on primary feathers, Dorset, UK, March

Colin Varndell / Dunnock (Prunella modularis) showing white pigment on primary feathers, Dorset, UK, March

Alex Hyde / Red algae living just below the surface of snow, known as 'Red Snow'. The red pigment provides protection from ultra-violet light. Austrian Alps at 2800 metres altitude. June.

Jane Burton / Sleeping 9-day puppies showing pigment freckles on nose

Willem Kolvoort / Great ramshorn snail (Planorbis corneus) sand winning pit, Holland. This snail does not have enough pigment in its skin, the red colour is caused by haemaglobin.

Tui De Roy / Greater Flamingo (Phoenicopterus ruber) preening color derived from pigment in Brine Shrimp, Rabida Island, Galapagos Islands, Ecuador

Yva Momatiuk & John Eastcott / Bald Eagle (Haliaeetus leucocephalus) powerful yellow legs and talons get pigment from salmon-rich diet, spring, south central Alaska

Tui De Roy / Greater Flamingo (Phoenicopterus ruber) preening, color derived from pigment in Brine Shrimp a main food source, Rabida Island, Galapagos Islands, Ecuador

David Shale / Deep sea amphipod {Cystisoma sp} Mesopelagic. Atlantic ocean. Body is totally transparent and the redness in the huge eye is the visual pigment in the retina.

John Cancalosi / Barite (BaS04), the main ore of barium, with Chalcopyrite. Mineral class: sulfates, barite is an important commercial mineral, widely used as a pigment, and used in medical tests. Sample from Dreislar...

John Cancalosi / Barite (barium sulphate, BaS04) on Cerrusite. Barite (orange), the major ore of barium, is an important commercial mineral widely used as a pigment and in medical tests. Cerrusite (lead carbonate, PbC...