Wall lizards come in many colours—and they also show iridescence (where colour changes with viewing angle). Researchers found that a lizard’s own base colour affects how its iridescence is perceived. Additionally, colour shifts likely stand out more to birds than to lizards themselves.

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3. Wall lizards come in many colours—and they also show iridescence (where colour changes with viewing angle). Researchers found that a lizard’s own base colour affects how its iridescence is perceived. Additionally, colour shifts likely stand out more to birds than to lizards themselves.