ST. LOUIS — A concerning discovery of Avian Influenza, commonly known as bird flu, in a wild wood duck discovered at a Saint Louis Zoo lake has led to the temporary closure and alteration of several zoo exhibits, announced by zoo officials on Friday. The bird was found deceased last week, prompting immediate action by the zoo staff to prevent the spread of the virus to other animals.
Migratory birds, such as ducks, are known carriers of the bird flu virus, which can occasionally be transmitted to other avian species under close conditions. In response to the detection, the zoo has escalated its biosecurity measures, which include the indefinite closure of the Cypress Swamp and Bird House, as well as earlier closing times for the Penguin & Puffin Coast to allow for thorough cleaning by the staff. Additionally, all behind-the-scenes tours have been suspended for the duration of the migratory bird season.
While no zoo animals have shown signs of infection or been diagnosed with the virus, the preventive closures are part of a broader effort to safeguard the health of the diverse species housed at the zoo. Zoo officials shared their hopes in a recent social media post, stating their intention to reopen all affected areas and allow birds to return to their outdoor environments as soon as it is deemed safe.
The outbreak of bird flu has had significant repercussions nationwide, particularly affecting poultry industries. In Missouri alone, one of the hardest-hit states in 2025, poultry fatalities have accounted for at least 15% of the chicken deaths in the country. Only Indiana and Ohio have reported higher death rates, highlighting the severe impact of the virus on national poultry production, as noted in a recent U.S. Department of Agriculture’s Egg Markets Overview report.
The Saint Louis Zoo is actively coordinating with various governmental agencies, including the State Veterinarian, the United States Department of Agriculture, and the Missouri Department of Conservation, to monitor the situation and implement additional safety measures as deemed necessary. This collaborative approach underscores the zoo’s commitment to maintaining the highest standards of animal safety and care amid ongoing concerns about the spread of bird flu.
By taking proactive steps in response to the detection of Avian Influenza in a wild duck within its premises, the Saint Louis Zoo aims to preempt any potential risk to its animal population, demonstrating vigilance and preparedness in managing wildlife health emergencies. As the migratory bird season progresses, the zoo continues to prioritize the well-being of all its resident species while keeping public and animal safety at the forefront of its operational policies.