#USA #Washington #IUCN #NABR #Long-Tailed Macaques

Background on IUCN's Status Decision

On October 9, 2025, the International Union for Conservation of Nature (IUCN) labeled the long-tailed macaque (Macaca fascicularis) as an endangered species. This classification has sparked considerable debate within the scientific community, primarily driven by a petition filed by the National Association for Biomedical Research (NABR) in 2023. The NABR's petition challenged the validity of the data utilized by IUCN, suggesting that it misrepresented existing scientific findings.

NABR's Petition and Response

The NABR argues that assessments from researchers such as Hansen et al. were flawed and raised issues regarding the accuracy of the information presented. Dr. Hank Jenkins, a notable figure who also submitted a petition to IUCN, claimed that there exists a potential conflict of interest among the study's authors, calling for a deeper investigation by IUCN. However, the current status surrounding these supposed conflicts remains ambiguous.

Adding to the controversy, the U.S. Fish and Wildlife Service found insufficient evidence to list long-tailed macaques as endangered, highlighting a lack of credible data on population impacts. Their rejection of the petition stood in stark contrast to the IUCN's classification, showcasing differing interpretations of the scientific evidence at hand.

Implications for Biomedicine

Long-tailed macaques are extensively used in biomedical research due to their physiological and genetic similarities to humans. Notably, five out of the twenty most commonly prescribed drugs were developed with the help of these macaques. Ongoing research involving these primates is critical for advancements in various fields, including regenerative medicine, cancer research, and vaccine development, including for COVID-19. The National Institutes of Health (NIH) has emphasized the indispensable role of long-tailed macaques in medical research, complicating discussions about their conservation status.

Critique of IUCN's Decision

Dr. Ray Hilborn, a renowned scientist and member of the NABR's scientific review team, expressed disappointment that IUCN had not thoroughly analyzed the scientific data provided. Hilborn pointed out that the lack of reliable data on population trends and distorted existing information raised serious questions regarding IUCN’s decision-making process.

Matthew R. Bailey, President of NABR, echoed similar sentiments, stating, "It’s baffling that IUCN classifies this species as endangered while simultaneously recognizing it as one of the most invasive species worldwide. Our organization will continue to advocate for policies that protect public health and uphold the integrity of scientific processes."

Invasive Species Recognition

According to the IUCN’s publications, long-tailed macaques are recognized as an invasive species. This classification brings to light a significant contradiction in their endangered status and highlights the necessity of reevaluating the conservation measures being implemented. The inquiry into this matter recently garnered attention during hearings held by the U.S. House of Representatives' oversight committee, where witnesses criticized organizations like PETA for politically influencing government investigations.

NABR's Mission and Commitment

Founded in 1979, NABR serves as a nonprofit association advocating for humane use of animals in biomedical research, education, and testing. Comprising over 340 members, including universities, pharmaceutical companies, and patient groups, NABR remains committed to ensuring scientific integrity while promoting public health.

For additional information concerning NABR’s initiatives and their ongoing efforts concerning the IUCN classification, please visit their website at NABR.