Download or read book Bird Populations (Collins New Naturalist Library, Book 124) written by Ian Newton and published by HarperCollins UK. This book was released on 2013-08-29 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.