Behavioral Ecology and Sociobiology

, Volume 47, Issue 3, pp 180–187

Duetting and mate-guarding in Australian magpie-larks (Grallina cyanoleuca)

  • M. L. Hall
  • R. D. Magrath
Original Article

DOI: 10.1007/s002650050009

Cite this article as:
Hall, M. & Magrath, R. Behav Ecol Sociobiol (2000) 47: 180. doi:10.1007/s002650050009


A recently favored hypothesis is that duetting in birds has a mate-guarding function: a male responds vocally to his partner’s song, thereby forming a duet that repels males who are attracted to her song. Previous studies have not provided unambiguous tests of the mate-guarding hypothesis because: (1) the probability of a male answering his partner’s song has not been shown to increase specifically when the female is fertile, and (2) the probability of a male answering his partner’s song has not been assessed separately from simply a higher song initiation rate. We investigated extra-pair paternity, mate-guarding, and duetting in the socially monogamous Australian magpie-lark (Grallina cyanoleuca). DNA fingerprinting revealed that 3% of young were the result of extra-pair paternity, and we found that males guarded fertile females by staying close to them. However, males did not initiate songs at a higher rate when females were fertile and actually reduced their probability of replying to female song during this period. We conclude that although male magpie-larks did guard fertile females in an attempt to prevent extra-pair copulations, they did not use duetting for this purpose.

Key words Bird song Duet Mate-guard Monogamy DNA fingerprinting 

Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • M. L. Hall
    • 1
  • R. D. Magrath
    • 1
  1. 1.Division of Botany and Zoology, Australian National University Canberra, A.C.T., 0200, Australia e-mail: Tel.: +61-2-62492866, Fax: +61-2-62495573AU

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