Cockburn, AndrewBrouwer, LyanneDouble, MichaelMargraf, Nicolasvan de Pol, Martijn2015-12-100158-4197http://hdl.handle.net/1885/65490Fairy-wrens (genus Malurus) maintain territories year round, and breed cooperatively, with all members of the social group provisioning young. Despite living with several adult males, the breeding female typically cuckolds all of them, seeking fertilisatiKeywords: fertilization (reproduction); group behavior; life history trait; mate choice; parent-offspring interaction; parental care; passerine; plumage; sperm competition; territory cooperative breeding; extra-pair copulation; fairy-wren; Maluridae; sperm competition.201310.1071/MU120942016-02-24