The U.S. Fish and Wildlife Service (USFWS) has declined a petition by PETA and other groups to list long-tailed macaques (Macaca fascicularis) as endangered under the Endangered Species Act (ESA). The decision was made after the USFWS determined the petition lacked credible evidence supporting the need for such a listing, considering potential threats to the species. This decision aligns with recent findings by the National Association for Biomedical Research (NABR) that challenged the IUCN’s ‘Endangered’ designation for long-tailed macaques.