A well-run zoo invests in animal welfare, contributes to species survival and connects visitors to wildlife they may never encounter in the wild. A poorly managed one exploits that same curiosity while cutting corners on care.
To find ethical zoos that prioritize animal well-being, look for independent humane certification, enrichment programs that encourage natural behaviors, transparent operations and a commitment to conservation.
Five Signs of a Well-Run Zoo
1. Independent humane certification
The single most reliable indicator of a zoo’s commitment to animal welfare is independent, third-party humane certification. Unlike self-reported standards or internal reviews, third-party certification means an outside organization has audited the facility against rigorous, science-based criteria and verified that animals are being treated humanely.
Look for American Humane Certified™ Zoos & Aquariums. The program has certified more than 85 zoological facilities across 19 countries, protecting the welfare of nearly 1.1 million animals.
2. Appropriate enclosures and enrichment
Animals in quality facilities have space to move, explore, rest and socialize with members of their own species. Enclosures should reflect an animal’s natural habitat as closely as possible, with access to shade, shelter, clean water and varied terrain.
Enrichment, the tools and activities that encourage natural behaviors such as foraging, climbing, swimming or problem-solving, should be visible throughout the facility. A zoo that takes welfare seriously provides cognitive and sensory stimulation every day, not just during public-facing presentations.
3. Active conservation participation
Ethical zoos contribute to conservation efforts in a variety of ways. Ask whether a facility actively supports local or global conservation initiatives, partners with wildlife agencies or participates in responsible breeding programs.
American Humane Certified zoos and aquariums play an active role in these efforts, and some partner with Global Humane Society, the international arm of American Humane Society, on biodiversity and wildlife protection initiatives worldwide.
4. Transparency about animal care
Facilities committed to humane treatment welcome questions. Staff should be willing to explain veterinary protocols, dietary programs, enrichment schedules and how they measure animal well-being.
Public reporting on animal births, transfers, medical care and mortality is another strong signal. Facilities that restrict access to this information or discourage visitor inquiry warrant closer scrutiny.
5. Educated, engaged staff
Zookeepers, trainers and docents at well-run facilities can speak knowledgeably about the animals in their care, the species’ conservation status and the behavioral cues that indicate good welfare.
The presence of trained, passionate staff members who use positive reinforcement and science-based care practices reflects an institutional culture that values animal well-being over entertainment.
What Humane Certification at Zoos and Aquariums Looks Like
Launched in 2016, the American Humane Certified Zoos & Aquariums program was the first certification effort solely dedicated to verifying the humane treatment of animals in zoos, aquariums and conservation centers.
The program evaluates welfare at the individual animal level, not just facility-wide policies, through a detailed, science-based process informed by an independent Scientific Advisory Committee of leading veterinarians, animal behaviorists, ethicists and scientists.
The certification has two components:
- Pre-audit application. Facilities provide detailed information about their animal collection, training and enrichment practices, record-keeping systems, veterinary care programs, emergency protocols and animal programs. This application must be completed before any on-site evaluation takes place.
- Multi-day, on-site inspections by independent auditors. These auditors are contracted by American Humane Society, independent from the organization and are not currently employed by any zoo or aquarium, allowing for a truly independent, third-party evaluation.
The on-site audit is animal-centric. Auditors evaluate species-specific welfare indicators for individual animals and groups, covering both directly observable metrics and information gathered through staff discussions and facility records.
The assessment includes physical condition, species-appropriate behaviors, social interactions, enrichment programs, environmental parameters, nutrition, veterinary care, staff knowledge and the use of positive reinforcement in training.
Three non-negotiable criteria must be met for any audit to proceed.
- Staff conduct that promotes animal welfare
- No observations of abuse
- Documentation of an active veterinary health plan
Failure on any one of these results in automatic failure of the entire audit.
When you see the American Humane Certified mark at a zoo or aquarium, it means that facility has met these rigorous, independently verified standards for humane animal treatment.
American Humane Certified zoos and aquariums include Tanganyika Wildlife Park in Goddard, Kansas; SANCCOB Cape Town Centre in South Africa; Denver Zoo in Colorado; and Schönbrunn Zoo in Vienna, Austria.
Red Flags to Watch For
Not every facility that calls itself a zoo, aquarium or wildlife center operates with animal welfare in mind. Before you visit, watch for these warning signs of a poorly managed operation.
- Animals housed in visibly cramped, barren or poorly maintained enclosures with no enrichment, shade or shelter from the elements
- Direct physical contact between visitors and wild animals promoted solely as entertainment, particularly with big cats, primates or bears
- Photo opportunities that require animals to be restrained, sedated or otherwise handled in ways that restrict natural behavior
- Staff who use punitive training methods, physical force or tools designed to intimidate animals
- No visible veterinary care infrastructure, and unwillingness to answer questions about animal welfare practices
- Marketing that emphasizes spectacle, stunts or unnatural animal performances over education and conservation
- Any of these should give a visitor pause. Responsible zoos and aquariums earn trust through transparency, accreditation and third-party humane certification.
Find a Humane Certified Zoo or Aquarium
Browse the certified zoos and aquariums directory by name or location to find a certified facility near you or at your next travel destination.
For wildlife-based travel experiences, the Global Humane Certified™ Ecotourism program, operated by Global Humane Society, the international arm of American Humane Society, evaluates tourism destinations for responsible, animal-first practices.
Frequently Asked Questions
Well-managed and independently certified zoos and aquariums often play a vital role in species conservation, scientific research and public education. Many endangered species exist in stable populations only because of zoo-based breeding programs.
The key is choosing facilities that meet high welfare standards, invest in conservation and treat animals humanely.
The Association of Zoos and Aquariums (AZA) accreditation evaluates a broad range of institutional standards, including governance, finances, education, safety, veterinary programs and conservation. AZA accreditation is focused primarily on facilities in the United States.
American Humane Certified prioritizes individual animal welfare through species-specific, science-based criteria verified by independent, third-party auditors who do not work for any zoo or aquarium. The program has certified more than 85 facilities across 19 countries.
Many facilities hold both designations, and the programs complement each other, but American Humane Certified is the only certification dedicated solely to animal welfare.
The process begins with a comprehensive pre-audit application submitted by the facility, covering the animal collection, training and enrichment practices, veterinary care programs, emergency protocols, and more.
Independent auditors then conduct multi-day, on-site inspections evaluating dozens of species-specific welfare indicators for individual animals and groups. In addition, zoos and aquariums must meet three non-negotiable criteria (staff conduct promoting welfare, no observations of abuse and an active veterinary health plan) for the audit to proceed. An independent Scientific Advisory Committee of leading veterinarians, behaviorists and ethicists informs the standards zoos and aquariums are measured against.
Certified facilities undergo periodic re-audits to maintain their American Humane Certified status. Several founding members of the program, originally certified when it launched in 2016, recently completed re certification, including Georgia Aquarium, Vancouver Aquarium, Brookfield Zoo and Mystic Aquarium.
At certified facilities, yes. Many American Humane Certified zoos and aquariums lead species and ecosystem conservation projects, contribute a portion of their revenue to support conservation, and/or engage in wildlife policy and advocacy efforts
