A host bird brings food to a cuckoo fledgling (IMAGE)

University of Cambridge

A host bird brings food to a cuckoo fledgling

Caption

A male superb fairy-wren brings food to a Horsfield’s bronze-cuckoo fledgling. 

Only cuckoos that most resemble the host’s own chicks have any chance of escaping detection. Over many generations the cuckoo chicks have evolved to mimic the host chicks.

Credit

Mark Lethlean

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