Eagles Are Falling, Bears Are Going Blind

It was late fall of 2022 when David Stallknecht heard that bodies were raining from the sky.

Stallknecht, a wildlife biologist at the University of Georgia, was already fearing the worst. For months, wood ducks had been washing up on shorelines; black vultures had been teetering out of tree tops. But now thousands of ghostly white snow-goose carcasses were strewn across agricultural fields in Louisiana, Missouri, and Arkansas. The birds had tried to take flight, only to plunge back to the ground. “People were saying they were literally dropping down dead,” Stallknecht told me. Even before he and his team began testing specimens in the lab, they suspected they knew what they would find: yet another crop of casualties from the deadly strain of avian influenza that had been tearing across North America for roughly a year.

Months later, the bird-flu outbreak continues to rage. An have died in the United States alone. Farms with known outbreaks have had to cull their chickens en masse, ; zoos have their birds indoors to shield them from encounters with infected waterfowl. The virus has been steadily trickling into mammalian populations—foxes, bears, mink, whales, seals—on both land and sea, fueling fears that humans could