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Flock-mate familiarity affects note composition of chickadee calls

  • Brittany A. CoppingerEmail author
  • Jordon E. Davis
  • Todd M. Freeberg
Short Communication

Abstract

Recent theory in animal communication predicts that a group’s communicative complexity is connected to its social complexity. Social complexity has typically been measured using group size as an index, with larger groups thought to be more complex than smaller groups. However, group size alone does not account for other social differences that could influence the diversity of interactions within a group that may influence communication. In this study, we asked if other social factors could influence communicative behavior in groups by testing the influence of group composition in the Carolina chickadees, Poecile carolinensis. We recorded the vocal behavior of four wild-caught captive groups of familiar chickadees (birds caught from the same naturally occurring flock) and four wild-caught captive groups of unfamiliar chickadees (birds caught from all different naturally occurring flocks) and then analyzed vocalizations by assessing the note types birds used in their chickadee calls. Flocks of familiar chickadees used fewer introductory notes, more C notes, and fewer hybrid notes in their calls compared to flocks of unfamiliar chickadees. Communicative complexity, measured by zero- and first-order uncertainty, did not differ between conditions. We conclude that note composition of call, but not call complexity, varies with flock-mate familiarity.

Keywords

Communication Communicative complexity Social complexity Chickadee 

Notes

Acknowledgements

We thank Anasthasia Sanchez de-Launay for the assistance with data collection in this study and thank Hwayoung Jung, Steven Kyle, Harry Pepper, and two anonymous reviewers for the helpful comments on earlier drafts of this manuscript. This work was supported by the National Science Foundation-IOS 1353327 to TMF.

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Copyright information

© ISPA, CRL 2019

Authors and Affiliations

  1. 1.Department of PsychologyUniversity of TennesseeKnoxvilleUSA
  2. 2.Department of Ecology and Evolutionary BiologyUniversity of TennesseeKnoxvilleUSA

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