Portugal SJ, Butler PJ, Green JA, Cassey POctober 2011Journal article Journal:Journal of OrnithologyVolume:152Issue:4, Springer Nature, pp.1055 - 1061No abstract availableKeywords:31 Biological Sciences , 3103 Ecology , 1.1 Normal biological development and functioning , Musculoskeletal DOI10.1007/s10336-011-0699-9