We Still Don’t Know What’s Killing the Birds
Is it a disease? A toxin? A parasite? Ecologists and wildlife health experts are working to solve the mystery of why so many songbirds in the Eastern and Midwestern U.S. are sick and dying.
Is it a disease? A toxin? A parasite? Ecologists and wildlife health experts are working to solve the mystery of why so many songbirds in the Eastern and Midwestern U.S. are sick and dying.