Extinction Date Estimation from Sighting Records R package EDE version 0.1.0 Estimates the historic date of extinction of a species from a time-ordered record of sighting events. Given a table of sighting counts per year, computes extinction date estimators from the sighting-record literature: optimal linear estimation under a record-value model (Roberts & Solow, 2003), nonparametric and sighting-effort-weighted persistence tests (Solow, 1993; Solow, 2005), a sighting-rate persistence test comparable across records with different observation periods (McInerny, Roberts, Davy & Cribb, 2006), a classical confidence interval on the end of a temporal range (Strauss & Sadler, 1989), a truncation-point extrapolation (Robson & Whitlock, 1964), and a combinatorial persistence test based on inclusion-exclusion over sighting-gap occupancy (Burgman, Grimson & Ferson, 1995). Every estimator is built on a single validated input object and returns a common result class with, where defined, a point estimate, a confidence interval, or a full persistence-probability curve. Software Depends: R (>= 4.1.0) Suggests: testthat (>= 3.0.0), knitr, rmarkdown, ggplot2 Rodrigo Fonseca Villa <rodrigo03.villa@gmail.com> Comprehensive R Archive Network (CRAN) Rodrigo Fonseca Villa [aut, cre] (ORCID: <https://orcid.org/0009-0005-2938-2270>) GPL (>= 3) 2026-08-07 application/tgz https://CRAN.R-project.org/package=EDE doi:10.32614/CRAN.package.EDE en-US