'The idea of 'sentinel chickens' seemed pretty incongruous when I first heard the phrase as a young undergraduate ... The notion of the humble chicken waiting like a trained soldier, alert and focused, for some unseen and approaching enemy just didn't seem likely. Hens en garde!' And yet guard they do. Not only chickens, but puffins, eagles, canaries and toucans- birds of all kinds are recruited by humans to help us interpret changes in our increasingly challenged and unpredictable world. These wonderful creatures continually sample the atmosphere, oceans, fields and forests, signalling toxic and environmental dangers that threaten all vertebrates. Through personal stories and fascinating examples, Nobel prizewinner Peter Doherty shows also how birds have contributed to cutting-edge medical research. Studying birds has helped us to understand the nature of human cancer, malaria and influenza,...
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