To cite PFW in publications use:

  Mason W. Maron (2025). PFW: Tools for Filtering and Processing Data
  from Project FeederWatch. R package version 0.1.0.
  https://github.com/ropensci/PFW

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {PFW: Filtering and Processing Data from Project FeederWatch},
    author = {Mason W. Maron},
    year = {2025},
    note = {R package version 0.1.0},
    url = {https://github.com/ropensci/PFW},
  }