National Wildlife Health Center

...advancing wildlife and ecosystem health

Avian Cholera Mortality Events in Califonia -- Winter 1999


Map of Avian Cholera Breakouts
LEGEND:
Red = Confirmed
Blue = Unconfirmed

Large dots = more than 3000
Small dots = less than 3000

1. Hayward Water Treatment Wetlands
Alameda County

  • Mortalities: 250
  • Species: Ruddy Ducks, Waterfowl
  • Confirmed: Yes
  • Ongoing: Yes
2. Llano Seco
Butte County

  • Mortalities: 243
  • Species: Ducks
  • Confirmed: Yes
  • Ongoing: Yes
3. Delevan National Wildlife Refuge
Colusa County

  • Mortalities: 1799
  • Species: Geese, Ducks, Coots
  • Confirmed: Yes
  • Ongoing: Yes
4. Colusa National Wildlife Refuge
Colusa County, California

  • Mortalities: 1746
  • Species: Snow Geese, Coots, Ruddy Ducks
  • Confirmed: No
  • Ongoing: Yes
5. Sacramento National Wildlife Refuge
Glenn County

  • Mortalities: 2350
  • Species: Geese, Coots
  • Confirmed: Yes
  • Ongoing: Yes
6. Lake Earl Wildlife Area
Del Norte County

  • Mortalities: 5100
  • Species: Primarily Coots, Ruddy Ducks
  • Confirmed: Yes
  • Ongoing: Yes
7. Salton Sea National Wildlife Refuge
Imperial County

  • Mortalities: 1620
  • Species: Grebes, Ruddy Ducks
  • Confirmed: Yes
  • Ongoing: Yes
8. Merced-Mariposa Pond
Merced County

  • Mortalities: 1485
  • Species: Primarily Coots
  • Confirmed: No
  • Ongoing: Yes
9. San Luis National Wildlife Refuge (at West Bear Creek)
Merced County

  • Mortalities: 4744
  • Species: Coots, Ducks
  • Confirmed: Yes
  • Ongoing: Yes
10. City of Davis Wetlands
Sacramento County

  • Mortalities: 3500
  • Species: Ducks
  • Confirmed: Yes
  • Ongoing: Yes
11. Butte Sink National Wildlife Refuge
Sutter County

  • Mortalities: 4103
  • Species: Ducks
  • Confirmed: Yes
  • Ongoing: Yes
12. Sutter National Wildlife Refuge
Sutter County

  • Mortalities: 848
  • Species: Ducks, Coots
  • Confirmed: No
  • Ongoing: Yes
13. San Joaquin River National Wildlife Refuge and Page Lake
Stanislaus County

  • Mortalities: 1037
  • Species: Geese, Ducks
  • Confirmed: Yes
  • Ongoing: Yes
14. Yolo Bypass Wildlife Area
Yolo County

  • Mortalities: 8700
  • Species: Coots, Ruddy Ducks
  • Confirmed: Yes
  • Ongoing: Yes
15. Stone Lakes National Wildlife Refuge
Sacramento County

  • Mortalities: 35
  • Species: Coots
  • Confirmed: No
  • Ongoing: Yes
16. Kesterson National Wildlife Refuge
Merced County

  • Mortalities: 1500 (est.)
  • Species: Coots, Shorebirds
  • Confirmed: No
  • Ongoing: Yes
17. Private Area near Kesterson
Merced County

  • Mortalities: 700 (est.)
  • Species: Coots, Shorebirds
  • Confirmed: No
  • Ongoing: Yes
 

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