In the latest addition to the New Naturalist series, Ian Newton explores bird populations and what causes their fluctuation - food supplies, competitors, predators, parasites, pathogens and human activity.
Ian Newton is an ornithologist and applied scientist, and a leading expert on bird ecology and biogeography, specialising in finches, waterfowl and birds of prey, especially the sparrowhawk. He graduated from Bristol University and gained his doctorate in finch behaviour at Oxford, followed by research on bullfinch damage in orchards. He joined the NERC in 1967, initially studying population ecology of geese and finches, followed by the impact of pesticides on birds of prey. He has written two previous New Naturalist volumes, Finches (1972) and Bird Migration (2010).
