Maintenance of Sperm Variation in a Highly Promiscuous Wild Bird

• Sara Calhim ,

  * E-mail: s.calhim@gmail.com

  Affiliation Section of Ecology, Department of Biology, University of Turku, Turku, Finland

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• Michael C. Double,

  Affiliations Australian Antarctic Division, Tasmania, Australia, Research School of Biology, Australian National University, Canberra, Australia

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• Nicolas Margraf,

  Affiliation Research School of Biology, Australian National University, Canberra, Australia

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• Tim R. Birkhead,

  Affiliation Department of Animal and Plant Sciences, University of Sheffield, Sheffield, United Kingdom

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• Andrew Cockburn

  Affiliation Research School of Biology, Australian National University, Canberra, Australia

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