First Confirmed Avian Flu Death in Endangered Wisconsin Whooping Crane

Ducky, a female whooping crane from the International Crane Foundation's breeding and reintroduction program in Wisconsin, died from highly pathogenic avian influenza (HPAI), marking the first confirmed death of this endangered species from the virus. Whooping cranes are critically endangered, with only about 700 left in North America and fewer than 70 in the eastern migratory population, making Ducky's death represent over 1% of this small flock. The crane was being prepared for release at Horicon National Wildlife Refuge but became lethargic and was transported back to the foundation for care before succumbing to the disease. HPAI, particularly the H5N1 strain, has been circulating in North American wild and domestic birds since late 2021 and can spread through contact with infected birds or contaminated environments. The foundation is monitoring other cranes potentially exposed to the virus, none of which have shown symptoms, and has increased biosecurity measures to protect the flock and staff. The loss of Ducky highlights the significant threat HPAI poses to the survival and recovery efforts of the whooping crane population.