Stick Insects Sway to Stay Alive
If you ever owned a pet stick insect as a child, you might have noticed them swaying back and forth at the end of a twig, but until recently, nobody knew what this strange behaviour was for.
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Thanks to Dorothy Floyd for pointing out that we have known anecdotally that this behaviour was likely a form of camouflage for several decades! (see Floyd (1987) Keeping Stick Insects)