Scott, SusanClegg, SonyaBlomberg, Simon PhillipKikkawa, JiroOwens, Ian P F2015-12-132015-12-130014-3820http://hdl.handle.net/1885/86939Passerine birds living on islands are usually larger than their mainland counterparts, in terms of both body size and bill size. One explanation for this island rule is that shifts in morphology are an adaptation to facilitate ecological niche expansion.Keywords: adaptation; ecomorphology; feeding ecology; generalist; island; niche breadth; passerine; animal; article; Australia; beak; body constitution; comparative study; environment; feeding behavior; geography; histology; New Zealand; physiology; songbird; Anima Foraging; Generalism; Islands; Morphology; Niche; Zosterops20032015-12-12