USFWS denies second PETA petition to list long-tailed macaques under Endangered Species Act, maintaining status quo for biomedical research
Executive summary: On July 14, 2026 the U.S. Fish and Wildlife Service rejected for the second time a petition by PETA and other activist groups to list long-tailed macaques under the Endangered Species Act. The ruling affects the availability of these primates for biomedical research and testing, influencing costs and supply chains for pharmaceutical and vaccine developers.
Who is involved: U.S. Fish and Wildlife Service, People for the Ethical Treatment of Animals (PETA), other activist groups, and the National Association for Biomedical Research (NABR) which advocates continued use of the species in research.
Likely next: Activists may file a new petition or pursue litigation within the next 60 days, while research institutions will continue to monitor any future regulatory developments.
On July 14, 2026 the U.S. Fish and Wildlife Service (USFWS) rejected for the second time a petition filed by People for the Ethical Treatment of Animals (PETA) and allied activist groups to list long-tailed macaques (Macaca fascicularis) as endangered or threatened under the Endangered Species Act. The decision means the species will not receive federal protection that could restrict its use in biomedical research, testing, and vaccine development. NABR and other research advocates welcomed the outcome as it preserves access to a primate model widely used in pharmaceutical studies, while animal‑rights groups signaled they may pursue further legal or administrative avenues.
Timeline
- — NABR: Der U.S. Fish and Wildlife Service lehnt zum zweiten Mal den Antrag von Aktivisten ab, Langschwanzmakaken in das Artenschutzgesetz aufzunehmen (PR Newswire)
Analysis — what this means
Sectors affected
- Biomedical research using long-tailed macaques
- Primate breeding and supply contracts
Regulatory implications
- Endangered Species Act listing process remains closed to long-tailed macaques pending a new petition
- Future petitions must meet updated scientific criteria under the ESA
Key entities
Sources
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INTELLIGENCE
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