Download and Extract Data from the 'OzButterflies' Database R package ButtR version 1.1.1 Provides tools to download and extract data from the 'OzButterflies' Database <doi:10.5281/zenodo.19019034>, which contains reflectance spectra, calibrated photographs, and cytochrome c oxidase subunit I (COI) sequences of Australian butterflies. The main function get_Oz_butterflies() downloads the database and extracts selected files to a specified directory using user-defined filters. Software Imports: httr, jsonlite Suggests: testthat (>= 3.0.0), withr Diogo Silva <diogojackson@hotmail.com> Comprehensive R Archive Network (CRAN) Diogo Silva [aut, cre] (ORCID: <https://orcid.org/0000-0002-0887-2001>), Jim McLean [aut] (ORCID: <https://orcid.org/0000-0001-6229-7063>) MIT + file LICENSE (https://CRAN.R-project.org/package=ButtR/LICENSE) 2026-04-21 application/tgz https://CRAN.R-project.org/package=ButtR doi:10.32614/CRAN.package.ButtR