Affiliation: | School of Environmental Sciences,;School of Biological Sciences and;Tyndall Centre for Climate Change Research, University of East Anglia, Norwich NR4 7TJ, UK;;Royal Society for the Protection of Birds, UK Headquarters, The Lodge, Sandy, Bedfordshire, SG19 2 DL, UK;and;Department of Zoology, University of Cambridge, Downing Street, Cambridge CB2 3EJ, UK |