[1] Univ Bristol, Sch Biol Sci, Bristol BS8 1TQ, Avon, England
[2] Swansea Univ, Dept Biosci, Swansea SA2 8PP, W Glam, Wales
[3] Univ Bielefeld, Dept Anim Behav, POB 100131, D-33501 Bielefeld, Germany
[4] Penn State Univ, Dept Anthropol, University Pk, PA 16802 USA
[5] CUNY, Hunter Coll & Grad Ctr, Dept Psychol, New York, NY 10065 USA
[6] Univ Illinois, Dept Anim Biol, Urbana, IL 61801 USA
[7] Auburn Univ, Dept Biol Sci, Auburn, AL 36849 USA
[8] Univ Cambridge, Dept Zool, Cambridge CB2 3DT, England
[9] Lund Univ, Dept Biol, S-22362 Lund, Sweden
[10] Univ Jyvaskyla, Ctr Excellence Biol Interact Res, Jyvaskyla 40014, Finland
[11] Univ Queensland, Queensland Brain Inst, Brisbane, Qld, Australia
[12] Ludwig Maximilians Univ t, Dept Evolutionary Biol, Munich, Germany
[13] Univ Sussex, Sch Life Sci, Brighton BN1 9QG, E Sussex, England
[14] Yale Univ, Dept Ecol & Evolutionary Biol, New Haven, CT 06511 USA
[15] Univ Lausanne, Dept Ecol & Evolut, CH-1015 Lausanne, Switzerland
[16] Univ Cambridge, Dept Zool, Cambridge CB2 3DT, England
[17] Zool Soc London, Inst Zool, Regents Pk, London NW1 4RY, England
[18] Carleton Univ, Dept Biol, Ottawa, ON K1S 5B6, Canada
[19] Newcastle Univ, Inst Neurosci, Newcastle, NSW NE2 4HH, Australia
[20] Univ Liverpool, Inst Integrat Biol, Liverpool L69 7ZX, Merseyside, England
[21] Univ Exeter, Ctr Ecol & Conservat, Penryn TR10 9FE, Cornwall, England
[22] Princeton Univ, Dept Ecol & Evolutionary Biol, Princeton, NJ 08544 USA
[23] Univ Melbourne, Sch BioSci, Parkville, Vic 3010, Australia
[24] Univ Michigan, Dept Ecol & Evolutionary Biol, Ann Arbor, MI 48109 USA
[25] Univ Calif Davis, Dept Wildlife Fish & Conservat Biol, Davis, CA 95616 USA
[26] Univ Calif Davis, Ctr Populat Biol, Davis, CA 95616 USA
[27] Max Planck Inst Chem Ecol, Hans Knoll Str 8, D-07745 Jena, Germany