Male Common Loons Signal Greater Aggressive Motivation By Lengthening Territorial Yodels

@inproceedings{Mager2012MaleCL,
  title={Male Common Loons Signal Greater Aggressive Motivation By Lengthening Territorial Yodels},
  author={John N. Mager and Charles Walcott and Walter H. Piper},
  year={2012}
}
Abstract We examined two critical predictions of the hypothesis that male Common Loons (Gavia immer) communicate greater aggressive motivation by increasing the number of repeat syllables within their territorial yodels. We observed (from >3,500 hrs of field observations of 58 males) the probability that territorial interactions escalated from territorial flyovers by intruders to stereotyped ‘social gatherings’ to escalated fights between residents and intruders was positively correlated to the… Expand
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