What is killing bald eagles in the U.S.?

Source: Science Daily

Bald eagles, as well as other wildlife, have been succumbing to a mysterious neurodegenerative disease in the southern United States since the 1990s. New research identifies the cause of these deaths: a toxin produced by cyanobacteria that grow on invasive aquatic plants. The problem is potentially exacerbated by herbicides used to control those plants.

https://www.sciencedaily.com/releases/2021/03/210325150202.htm