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I'll scratch your back... antelope and myna birds enjoy a symbiotic relationship

Chhotu Khan / solent

A flock of bank myna birds takes roost on the backs of nilgai antelope in Keoladeo National Park, Rajasthan, India, to enjoy a lunch of fleas and other insects, and the antelope don't appear to mind. What other animals can you think of that enjoy mutually beneficial relationships?

Chhotu Khan / solent