22nd October 2025
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Blue may be the rarest animal colour in nature — these creatures show us why.
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True blue pigments are almost nonexistent in animals. Most blue hues come from structural coloration — microscopic features that reflect blue light
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Found in tropical rainforests of Suriname & Brazil. Its bright blue colour is a warning (aposematism) signalling high toxicity to predators
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This tiny octopus flashes bright blue rings when threatened. The blue is produced via iridophores and serves as a bold warning sign.
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Native to Grand Cayman, the blue iguana’s colour intensifies during mating season. The bluish hue helps signal fitness and may aid territorial displays
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Its dazzling blue wings come not from blue pigment but from light-reflecting wing scale structures — making it appear brilliantly blue.
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The distinct blue feet come from collagen structures plus carotenoids in diet. They’re used in mating displays so brighter feet = healthier bird.
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This bird appears blue though its feathers contain no blue pigment — the colour comes from feather micro-structures scattering light.
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