2021 songbird illness

The 2021 songbird illness was an unknown disease that caused the deaths of many songbirds in North America.[1][2][3]

References

  1. ↑ "As the East's Songbird Epidemic Fades, the Cause Remains Unknown | Audubon". September 22, 2021.
  2. ↑ "Songbird disease disappears as it came — mysteriously". November 8, 2021.
  3. ↑ "Disease that blinded, killed songbirds vanishes as mysteriously as it arrived".