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Related Experiment Videos

Call-note discriminations in black-capped chickadees (Poecile atricapillus).

C B Sturdy1, L S Phillmore, R G Weisman

  • 1Department of Psychology, Queen's University, Kingston, Ontario, Canada.

Journal of Comparative Psychology (Washington, D.C. : 1983)
|January 10, 2001
PubMed
Summary

Black-capped chickadees (Poecile atricapillus) categorize bird vocalizations similarly to humans. This study shows chickadees can learn and generalize auditory discriminations of conspecific call notes.

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Area of Science:

  • Animal Behavior
  • Bioacoustics
  • Cognitive Ethology

Background:

  • Bioacousticians previously classified black-capped chickadee (Poecile atricapillus) call notes into four distinct types (A, B, C, D) based on sound spectrogram analysis.
  • Understanding avian vocal communication requires investigating how birds perceive and categorize their own calls.

Purpose of the Study:

  • To investigate whether black-capped chickadees can learn auditory discriminations between and within established call note categories.
  • To determine if chickadees exhibit stimulus control transfer and generalization for conspecific vocalizations.
  • To compare avian categorization of call notes with human bioacoustician classifications.

Main Methods:

  • Experiment 1: Chickadees were trained on operant auditory discriminations involving within-category and between-category call note types.

Related Experiment Videos

  • Experiment 2: Assessed transfer of inhibitory stimulus control using novel, rewarded exemplars of previously unrewarded categories.
  • Experiment 3: Examined propagation of positive stimulus control when novel exemplars were replaced by original ones.

    • Main Results:

    • Chickadees learned both within- and between-category discriminations, learning the latter significantly faster.
    • Evidence of transfer of stimulus control to novel exemplars within the same categories was observed.
    • Positive stimulus control propagated back to original exemplars when novel ones were reintroduced.

    Conclusions:

    • Black-capped chickadees demonstrate the ability to categorize conspecific call notes into distinct groups.
    • The categorization abilities of chickadees align with those identified by human bioacousticians, suggesting shared perceptual frameworks.
    • Findings support the concept of open-ended categorization in non-human animals for vocal communication.