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Vincenzo Penteriani1, María del Mar Delgado, Letizia Campioni

  • 1Department of Conservation Biology, Estación Biológica de Doñana, C.S.I.C., Seville, Spain. penteriani@ebd.csic.es

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Summary
This summary is machine-generated.

Eagle owls use moonlight to enhance their visual communication. Their calls and call site selection are more frequent and elevated during moonlit nights, demonstrating lunar influence on nocturnal signaling.

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Area of Science:

  • Animal Behavior
  • Sensory Ecology
  • Nocturnal Communication

Background:

  • Lunar cycles influence Earth's biological rhythms and behaviors.
  • Ambient light, including moonlight, impacts visual communication in animals.
  • Eagle owls (Bubo bubo) use white throat plumage for visual signaling during vocal displays.

Purpose of the Study:

  • To investigate if moonlight enhances the conspicuousness of eagle owl visual signals.
  • To determine the influence of lunar cycles on eagle owl vocal communication behavior.

Main Methods:

  • Observed eagle owl vocal displays and call site selection.
  • Correlated calling activity and behavior with moonlight intensity.
  • Analyzed the frequency and location of call displays under varying lunar conditions.

Main Results:

  • Eagle owl call displays are significantly influenced by moonlight availability.
  • Silent nights were more frequent during new moon periods compared to moonlit nights.
  • Increased calling bouts and higher call post locations were observed during moonlit nights.

Conclusions:

  • Moon phase directly affects the visual signaling behavior of eagle owls.
  • Moonlight plays a crucial role in the nocturnal communication strategies of this species.
  • Provides a foundation for studying lunar-mediated visual communication in nocturnal animals.