mimicry
US /ˈmɪm.ɪ.kri/
UK /ˈmɪm.ɪ.kri/

1.
2.
(biology) the close external resemblance of an animal or plant (or part of one) to another animal or plant or to an inanimate object
:
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The insect's mimicry of a twig allowed it to blend seamlessly into its environment.
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Batesian mimicry is a form of mimicry where a harmless species has evolved to imitate the warning signals of a harmful species.