A Wisconsin whooping crane, Ducky, died from bird flu on Sept. 18, 2025, the first such death in the species.

A female whooping crane named Ducky, part of a conservation program in Wisconsin, died from Highly Pathogenic Avian Influenza on September 18, 2025, marking the first known death of a whooping crane from the virus. The bird, raised to avoid human imprinting, was among eight cranes slated for release at Horicon National Wildlife Refuge. Officials believe she contracted the virus from wild birds or contaminated environments. Though other cranes in the group remain healthy, the foundation has increased biosecurity measures. The loss is significant, representing over 1% of the eastern migratory population, which numbers fewer than 70 birds.