Among the first bird species to return to Michigan each year, the red-winged blackbird is a telltale sign of spring. Red-winged blackbirds are one of Michigan's early spring birds.

Chicago is one of the most dangerous cities in the United States for migrating birds, and a glassy lakefront conference center was especially lethal.

Director Joshua Oppenheimer, previously a documentarian who has chronicled dark acts of self-delusion, shifts to a postapocalyptic musical with similar themes.