Global incidence of female birdsong is predicted by territoriality and biparental care in songbirds

  • Karan J. Odom* (Corresponding Author)
  • , Macelo Araya Salas
  • , Lauryn Benedict
  • , Kristi Lim
  • , James Dale
  • , Wesley H. Webb
  • , Catherine Sheard
  • , Joseph A. Tobias
  • , Gregory F. Ball
  • , Michelle L. Hall
  • , Naomi E. Langmore
  • , Michael S. Webster
  • , Katharina Riebel
  • *Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Pronounced sexual dimorphism is generally assumed to evolve through sexual selection for elaborate male traits. However, there is increasing evidence that sexual dimorphism in traits such as birdsong may also evolve through loss of elaboration in females, but the evolutionary drivers underlying this process are obscure. Here we analyse ecological and natural history traits for over 1300 songbird species and show that increased female song incidence and elaboration are most directly associated with year-round territoriality, biparental care, and large body size. Phylogenetic path analysis indicates that mating system and breeding latitude primarily have indirect effects on female song evolution. Stable, tropical life histories and mating systems with biparental care promote female song, whereas evolutionary transitions to migration, reduced territoriality, and loss of male care led to losses or reductions of female song incidence. Our analyses provide a comprehensive framework for studying the drivers of sex differences and similarities in birdsong and reveal novel interactions among natural history and sexual selection pressures that have been hypothesized to independently shape elaborate traits.
Original languageEnglish
Article number6157
Number of pages11
JournalNature Communications
Volume16
DOIs
Publication statusPublished - 21 Jul 2025

Bibliographical note

We thank Kevin Omland, Jordan Price, Eliot Miller, Conor Taff, Gavin Leighton, Russell Ligon, Irby Lovette, Victoria Austin, Anastasia Dalziell, Carel ten Cate, Hans Slabekoorn, and Judith Varkevisser for feedback and useful discussions that contributed to the design of this project. We thank Jillian Ditner and the Bartels Science Illustration Program at the Cornell Lab of Ornithology for figure illustration.

Data Availability Statement

Data availability
All data are available for download at figshare: 10.6084/m9.figshare.26799523. Source data are also provided as a Source Data file. Source data are provided with this paper.

Code availability
All associated code for statistical analyses is available for download at figshare: https://doi.org/10.6084/m9.figshare.26799523.

Funding

Funding was provided by: the European Union’s Horizon 2020 research and innovation programme (Marie Sklodowska-Curie grant no. 703999-YnotSing to KJO) and a U.S. National Science Foundation (NSF) Postdoctoral Research Fellowship in Biology (grant no. 1612861 to KJO), the Cornell Lab of Ornithology Rose Postdoctoral Fellowship Fund, and the University of Maryland, College Park.

FundersFunder number
European Research Council703999
National Science Foundation 1612861

    Keywords

    • Sexual selection
    • Behavioural ecology

    Fingerprint

    Dive into the research topics of 'Global incidence of female birdsong is predicted by territoriality and biparental care in songbirds'. Together they form a unique fingerprint.

    Cite this