NABR Comment on IUCN Determination

EQS-News: National Association for Biomedical Research / Key word(s): Miscellaneous/Miscellaneous NABR Comment on IUCN Determination 14.10.2025 / 00:55 CET/CEST The issuer is solely responsible for the content of this announcement. WASHINGTON, Oct. 13, 2025 /PRNewswire/ -- The International Union for Conservation of Nature (IUCN) issued a decision on October 9, 2025, to retain the "Endangered" status determination for long-tailed macaque ("LTM") monkeys (Macaca fascicularis).

The latest issuance by the IUCN follows a 2023 petition filed by the National Association for Biomedical Research (NABR) challenging the IUCN status determination. NABR's petition demonstrates that reviews by Hansen et. al., which the IUCN has used as the basis for its status determinations, misrepresent existing scientific data.¹ More information regarding the NABR petition is available online at www.nabr.org.

A separate petition filed with the IUCN by Dr. Hank Jenkins asserts that the Hansen et al. authors possess conflicts of interest that require further investigation by the IUCN. It is unclear if such conflicts exist, or if the authors of the IUCN review possess conflicts requiring disclosure or recusal.

On October 7, 2024, the U.S. Fish and Wildlife Service ("the Service") rejected a petition filed by advocacy groups to list "LTM" monkeys under the Endangered Species Act ("ESA"). The petition contains the same information submitted to the IUCN which is the basis for the IUCN's current assessment. In rejecting the petition, the Service stated "the petition did not present credible information to support impacts to populations or the species as a whole." The full findings from the Service on the petition to list long-tailed macaques under the U.S. Endangered Species Act is published in the Federal Register and is located here: "LTM_Petition.pdf." No government in the world considers "LTM" monkeys to be endangered. Peer-reviewed scientific publications demonstrate the latest IUCN determination, and information used in the determination, are flawed and unsupported.²