Article Dans Une Revue Proceedings of the Royal Society B: Biological Sciences Année : 2023

Binocular field configuration in owls: the role of foraging ecology

Simon Potier
Alexandre Roulin
Graham Martin
  • Fonction : Auteur
Steven Portugal
Thierry Bouchet
  • Fonction : Auteur
Romuald de Romans
  • Fonction : Auteur
Eva Meyrier
  • Fonction : Auteur
Almut Kelber

Résumé

The binocular field of vision differs widely in birds depending on ecological traits such as foraging. Owls (Strigiformes) have been considered to have a unique binocular field, but whether it is related to foraging has remained unknown. While taking into account allometry and phylogeny, we hypothesized that both daily activity cycle and diet determine the size and shape of the binocular field in owls. Here, we compared the binocular field configuration of 23 species of owls. While we found no effect of allometry and phylogeny, ecological traits strongly influence the binocular field shape and size. Binocular field shape of owls significantly differed from that of diurnal raptors. Among owls, binocular field shape was relatively conserved, but binocular field size differed among species depending on ecological traits, with larger binocular fields in species living in dense habitat and foraging on invertebrates. Our results suggest that (i) binocular field shape is associated with the time of foraging in the daily cycle (owls versus diurnal raptors) and (ii) that binocular field size differs between closely related owl species even though the general shape is conserved, possibly because the field of view is partially restricted by feathers, in a trade-off with auditory localization.

Dates et versions

hal-04913482 , version 1 (27-01-2025)

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Citer

Simon Potier, Alexandre Roulin, Graham Martin, Steven Portugal, Vincent Bonhomme, et al.. Binocular field configuration in owls: the role of foraging ecology. Proceedings of the Royal Society B: Biological Sciences, 2023, 290 (2009), pp.20230664. ⟨10.1098/rspb.2023.0664⟩. ⟨hal-04913482⟩
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