Vocal matching by orange-fronted conures (Aratinga canicularis)

Area of Science:

• Animal Behavior
• Bioacoustics
• Primate Communication

Background:

• Vocal matching functions are understood in stable social groups but less so in fission-fusion species.
• Fission-fusion species are non-territorial with variable group composition and limited specialized calls.
• Understanding vocal matching in these complex social systems is crucial for evolutionary insights.

Purpose of the Study:

• To investigate vocal matching in a fission-fusion parrot species, the orange-fronted conure (Aratinga canicularis).
• To determine the function of loud contact calls (chee) in wild and captive conure flocks.
• To analyze patterns of call similarity during interactions preceding flock fusion.

Main Methods:

• Conducted interactive playback experiments using loud contact calls (chee) in Costa Rica.
• Presented recorded calls to wild and captive orange-fronted conure flocks.
• Analyzed changes in call similarity between stimulus and response calls over time.

Main Results:

• 30% of wild flocks and 21% of captive trials showed significant changes in call similarity.
• Observed both convergent (increasing similarity) and divergent (decreasing similarity) patterns.
• Many trials displayed variable or disjunct changes in call similarity, lacking a single trend.

Conclusions:

• Chee exchanges in orange-fronted conures appear to be a form of negotiation rather than simple greetings.
• The observed complex patterns of call similarity support a role in mediating social interactions and flock dynamics.
• Findings provide evidence for sophisticated vocal communication and negotiation strategies in fission-fusion parrot societies.