USFWS propose to list the Jamaican kite swallowtail (Eurytides marcellinus), a butterfly species from Jamaica, as an endangered species under the ESA. After a review of the best scientific and commercial data available, they find that listing the species is warranted. If finalized this rule would add this species to the List of Endangered and Threatened Wildlife and extend the Act's protection to the species. They will accept comments received or postmarked on or before 16 June 2026. Rachel London, Manager, Branch of Delisting and Foreign Species, Ecological Services Program, USFWS; 703-358-2171; rachel_london@fws.gov. (Federal Register 17 April 2026 [Proposed Rule] Pages 20610-20619)