Reviews: Invisible connections: why migrating shorebirds need the Yellow Sea (by Kam, J. van de, Battley, p., McCaffery, B., Rogers, D., Hong, J.-S., Moores, N., Yung-Ki, J., Lewis, J. & piersma, T.); Albatross: their world, their ways (by De Roy, T., Jones, M. & Fitter, J.); Health of Antarctic wildlife (Kerry K.R. & Riddle M.J., eds.)