Leedman, AMagrath, Robert D2015-12-132015-12-130003-3472http://hdl.handle.net/1885/85818In some species of birds, individual adults feed different subsets of the brood after the young have left the nest. However, few studies have shown that such 'brood division' represents long-term separation into subfamilies, rather than short-term biasesKeywords: cooperative breeding; hypothesis testing; parental care; passerine; Aves; Passeriformes; Sericornis frontalis200310.1006/anbe.2003.21642015-12-12