We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleGeographical variation in bill size across bird species provides evidence for Allen's rule.AuthorsSymonds MR; Tattersall GJPublicationThe American naturalist, 2010, Vol 176, Issue 2, p188ISSN1537-5323Publication typearticleDOI10.1086/653666