`Natural experiment' Demonstrates Top-Down Control of Spiders by Birds on a Landscape Level Rogers, Haldre ; Hille Ris Lambers, Janneke ; Miller, Ross ; Tewksbury, Joshua J. Abstract Publication: PLoS ONE Pub Date: September 2012 DOI: 10.1371/journal.pone.0043446 Bibcode: 2012PLoSO...743446R