Current Situation
The Nonhuman Rights Project (NhRP), founded by Steven Wise, has been the most active litigant seeking common law personhood for specific animals. NhRP has filed habeas corpus petitions on behalf of chimpanzees (Tommy, Kiko, Hercules, Leo) and an elephant (Happy at the Bronx Zoo) in New York State courts. The New York Court of Appeals ruled in 2022 that Happy the elephant was not a "person" entitled to habeas corpus, declining to extend common law personhood to an elephant. However, the case attracted the most extensive legal argument on animal cognition and rights ever heard by a major appellate court, and the dissent by Judge Rowan Wilson is a significant legal text on animal interests. Argentina has been more receptive to animal personhood arguments. A habeas corpus petition on behalf of Sandra the orangutan at Buenos Aires Zoo was partially successful in 2014, with a court recognizing her as a "non-human person" with rights. Sandra was subsequently relocated to a sanctuary in Florida. Colombia's Constitutional Court has recognized the right to a healthy environment in ways that encompass wildlife welfare. Several countries have legislatively recognized animal sentience without creating personhood. France amended its Civil Code in 2015 to recognize animals as "living beings endowed with sentience." New Zealand, the EU, and many other jurisdictions have similar legislative language. These reforms change how animal welfare must be weighed in regulatory and legal decisions without creating full legal personhood. The welfare implications of personhood discussions are significant: if animals have legally recognized interests, welfare violations become actionable beyond the limited criminal penalties of animal cruelty laws.
Key Welfare Issues
Evidence-based welfare science continues to advance our understanding of what animals experience and what interventions matter most. Translating this science into practical improvements across diverse contexts requires collaboration between researchers, practitioners, policymakers, and communities.
Pathways Forward
Sustained progress on animal welfare requires investment in science, policy, industry engagement, and public education. International frameworks from WOAH and regional bodies provide scaffolding, while local implementation must be adapted to cultural and economic contexts.
Further Reading
Resources from the World Organisation for Animal Health, peer-reviewed journals including Animal Welfare and Applied Animal Behaviour Science, and welfare organizations worldwide provide evidence-based guidance.