Avian Influenza Cause of Death in Harbor Seal and Chilean Flamingo at Lincoln Park Zoo

Chicago (January 15, 2025) – Lincoln Park Zoo reports that testing has confirmed highly pathogenic avian influenza was the cause of death for a Chilean flamingo on January 8 and harbor seal on January 9.

The zoo is saddened by the loss of a Chilean flamingo named Teal and a harbor seal named Slater. Teal hatched this fall and was just getting acquainted with her flock and keepers. Slater was 7 years old and was a beloved seal known for his rambunctious and curious nature. He was a quick learner and often could be seen participating in training sessions with keepers. Both will be deeply missed.

“This is sad news for wildlife and for the zoo team. Not only are we facing the first known cases of HPAI in animals in our care, but we’ve lost two amazing animals,” said Lester E. Fisher Director of Veterinary Services Dr. Kathryn Gamble, DVM, Dipl. ACZM, Dip. ECZM. “While highly pathogenic avian influenza is a naturally occurring virus in free-ranging waterfowl, more mammal species have been reported to be susceptible to HPAI since 2022.”

While the confirmed source of exposure is unknown for either case, it is near certain the cause is from contact with a waterfowl infected with HPAI. The Centers for Disease Control shares that HPAI is spread through saliva, nasal secretions, and feces of infected birds. Safety is a top priority at the zoo. Zoo visitors are not at risk of contracting HPAI from Lincoln Park Zoo animals.

“Because highly pathogenic avian influenza is spread by free-ranging birds, it is no riskier to visit Lincoln Park Zoo than to enjoy a walk outdoors,” said President & CEO and ornithologist Megan Ross, Ph.D. “The zoo remains a safe place to connect with the animals in our care.”

Prior to these results, the zoo had been monitoring HPAI reports and had enacted its multi-tier proactive HPAI Response Plan which addresses considerations for staff and animals alike. Such measures include additional personal protective equipment, removing opportunities for cross contamination between species, and focused monitoring for changes in individual animal health or behavior. To protect the animals in the zoo’s care, some bird species will remain behind the scenes and the McCormick Bird House will be closed until further notice.

“Sharing this news of highly pathogenic avian influenza in the area is important for our community at large,” said Director of the Urban Wildlife Institute Seth Magle, Ph.D. “To protect yourself, do not handle wildlife. Additionally, keep your pets safe by keeping cats indoors and dogs on leash away from wildlife.”

About Lincoln Park Zoo

Lincoln Park Zoo inspires communities to create environments where wildlife will thrive in our urbanizing world. The zoo is a leader in local and global conservation, animal care and welfare, learning, and science. A historic Chicago landmark founded in 1868, the not-for-profit Lincoln Park Zoo is a privately-managed, member-supported organization and is free and open 365 days a year. Visit us at lpzoo.org.