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Parasites: what causes some species to evolve to exploit others

By Louise Gentle, Senior Lecturer in Wildlife Conservation, Nottingham Trent University
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If you saw the first episode of David Attenborough’s new BBC series Perfect Planet, you will have seen the astounding bloodsucking behaviour of the vampire finches. These small birds exist only on two remote islands in the Galapagos and have evolved to drink the blood of much larger seabirds.

You will also have seen the curious behaviour of the booby,…

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