Change in beak overhangs of cliff swallows over 40 years: Partly a response to parasites?

• Gigi S. Wagnon,

  Roles Conceptualization, Data curation, Investigation, Methodology, Writing – review & editing

  Affiliation Department of Biological Sciences, University of Tulsa, Tulsa, Oklahoma, United States of America

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• Olivia M. Pletcher,

  Roles Data curation, Investigation, Methodology, Writing – review & editing

  Affiliation Department of Biological Sciences, University of Tulsa, Tulsa, Oklahoma, United States of America

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• Charles R. Brown

  Roles Conceptualization, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Supervision, Writing – original draft

  * E-mail: charles-brown@utulsa.edu

  Affiliation Department of Biological Sciences, University of Tulsa, Tulsa, Oklahoma, United States of America

  https://orcid.org/0000-0002-6226-3864

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