Ever witnessed thousands upon thousands of warblers streaming overhead nonstop? In early October, birders in Chicago experienced a migration spectacle that they won’t soon forget. Nathan Goldberg, Marky Mutchler, and Jacob Drucker report on this megaflight, what caused it, and how birders made sense of the chaos, as well as the sad reality of the window-strikes that resulted and what you can do to help.
This is only the fourth time the small-billed elaenia has been seen in North America. The first time, the bird was spotted in Douglass Park in Chicago.