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Behavioral Ecology and Sociobiology

, Volume 15, Issue 1, pp 69–71 | Cite as

The “dawn chorus” and incubation in the coot (Fulica atra L.)

  • John A. Horsfall
Article

Summary

It has been proposed that both acoustic and non-acoustic factors could explain the dawn peak of territorial advertisement in birds. The coot is a territorial waterbird which does not use vocal advertisement either to attract mates or defend territory boundaries. In spite of the absence of acoustic factors affecting the time budgeting of advertisement, this species shows a dawn peak of display and aggressive behaviours. This trend occurs both in the presence and absence of non-territorial ‘prospecting’ birds, but the trends are quantitatively different in these two cases (Fig. 1). Males participate in display and fighting more often than females, probably because of their greater size and effectiveness in defence. This asymmetry in defence abilities governs the time budgeting of incubation, the male tending to take time off the nest when territorial defence is most necessary (Fig. 2).

Keywords

Aggressive Behaviour Defend Time Budget Great Size Territorial Defence 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1984

Authors and Affiliations

  • John A. Horsfall
    • 1
  1. 1.Edward Grey Institute of Field Ornithology, Department of ZoologyUniversity of OxfordOxfordEngland

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