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".


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