Newtonian birds in space and time: Speciation and Biogeography of Birds by Ian Newton. Academic Press, 2003. £49.95 hbk (668 pages) ISBN 0 12 517375 X.: Speciation and Biogeography of Birds by Ian Newton. Academic Press, 2003. £49.95 hbk (668 pages) ISBN 0 12 517375 X.