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USGS National Wildlife Health Center
Quarterly Wildlife Mortality Report
July 1998 to September 1998

Location Dates Species Mortality Diagnosis Reported
AL Mobile 9/22/98- 09/29/98 Brown Pelican 8 Open NW
AZ Prescott 07/15/98- 10/30/98 House Finch, Lesser Goldfinch 40 (e) Salmonellosis NW
AR Jacksonville 05/31/98- 06/05/98 Mallard, Canada Goose 20 (e) Toxicosis: diazinon SC
CA Kings Co. Wetlands 06/10/98- 10/29/98 American Coot, Northern Shoveler, Unidentified Duck, Mallard, Northern Pintail 16,367 Botulism type C CFG
CA Coyote Creek, San Francisco Bay NWR 09/06/98- 10/24/98 Northern Shoveler, Gadwall, Mallard, Western Gull, Green-winged Teal 429 Botulism type C NW
CA Delevan NWR 08/10/98- 10/20/98 Mallard, Green-winged Teal, Northern Shoveler, American Coot, Fish 1,103 Botulism type C NW
CA Kings County Flood Basin 09/07/98- 09/25/98 Clark's Grebe, Western Grebe 72 Open NW
CA Lower Klamath & Tule Lake NWRs 07/10/98- 10/01/98 Mallard, Northern Pintail, American Wigeon, American Coot, Green-winged Teal 2,980 Botulism type C NW
CA Salton Sea 07/01/98- 10/06/98 California Gull, Brown Pelican, Herring Gull, Ring-billed Gull, Caspian Tern 835 Botulism type C NW
CA Salton Sea 07/28/98- 08/20/98 Great Blue Heron 12 Salmonellosis NW
CA Sunnyvale Water Treatment Plant 09/20/98- 10/24/98 Ruddy American Coot, Northern Shoveler, Mallard, Gadwall 573 Botulism type C NW
CO Rocky Mountain Arsenal NWR 07/12/98- 07/16/98 Canada Goose 21 Botulism type C NW
ID American Falls Reservoir 08/15/98- 09/22/98 Green-winged Teal, Mallard, American Wigeon, Gadwall, American Avocet 5,000 (e) Botulism suspect NW
ID Camas NWR 08/08/98- 09/24/98 Unidentified Duck, Ruddy Duck, Mallard, Redhead, American Coot 122 Botulism type C NW
IL Chautauqua NWR 09/14/98- 10/14/98 Green-winged Teal, Blue-winged Teal, Northern Shoveler, Unidentified Shorebird, Unidentified Gull 2,610 (e) Botulism suspect NW
IN Marion 07/26/98- 08/07/98 Muscovy 14 Duck plague NW
KS Cheyenne Bottoms Wildlife Area 06/25/98- 10/05/98 Mallard, Unidentified Duck, Blue-winged Teal, American Coot, Unidentified Egret 2,304 Botulism type C NW
LA Lake Arthur 07/07/98- 07/31/98 Canada Goose 2 Avian pox suspect NW
ME Frenchville 07/20/98- 07/27/98 Common Grackle 25 (e) Toxicosis: organo- phosphorus cmpd. suspect NW
ME Presquile Isle 07/20/98- 07/21/98 Unidentified frog (tadpoles), Spotted Salamander 100 (e) Iridovirus infection NW
MA Boston 08/24/98- 09/01/98 Mallard 40 (e) Botulism suspect NW
MT Bowdoin NWR 07/18/98- 10/05/98 Green-winged Teal, Mallard, Blue-winged Teal, Northern Pintail, Gadwall 4,000 (e) Botulism suspect NW
MT Medicine Lake NWR 07/15/98- 09/14/98 Unidentified Duck, American Coot, Gadwall, Northern Pintail, Green-winged Teal 2,230 Botulism type C NW
NE Lake McConaughy 08/25/98- 9/15/98 Green-winged Teal, Blue-winged Teal, Mallard, American Coot, Northern Pintail 1,000 (e) Botulism type C NW
NV Churchill County Wetlands 07/08/98- 10/14/98 Green-winged Teal, Northern Shoveler, Northern Pintail, Mallard, American Coot 5,547 Botulism type C NW
NM Albuquerque 06/27/98- 08/28/98 Canada Goose, Domestic Duck, Pekin Duck, Pied-billed Grebe 55 Botulism suspect NW
NM Hatch 09/09/98- 10/06/98 Green-winged Teal, Northern Shoveler, Cinnamon Teal, Gadwall, Mallard 2,000 (e) Botulism type C NW, NM
NY Little Galloo Island 07/29/98- 07/29/98 Double-crested Cormorant 950 (e) Trauma: gunshot suspect NY
ND Five wetlands in and near Long Lake NWR 06/30/98- 09/25/98 Blue-winged Teal, Green-winged Teal, American Coot, Mallard, Western Grebe 11,188 Botulism type C NW
ND Lake Alice NWR 07/14/98- 09/22/98 Gadwall, American Coot, Unidentified Duck, Mallard, Northern Pintail 4,114 Botulism suspect NW
ND 10 McIntosh and Logan County wetlands 06/24/98- 09/25/98 Unidentified Duck, Northern Pintail, Green-winged Teal, Mallard, American Coot 1,357 Botulism type C NW
ND 4 Richland County wetlands 09/01/98- 10/15/98 American Coot, Unidentified Duck, Blue-winged Teal, Northern Shoveler, Gadwall 3,873 Botulism type C NW
ND Upper Souris NWR 08/13/98- 09/04/98 Mallard, American Coot, Gadwall, Unidentified Blue-winged Teal 6,500 (e) Botulism type C NW
ND Williston 08/26/98- 09/14/98 Mallard 104 Botulism type C NW
OH Goshen 08/01/98- 09/14/98 Unidentified Waterfowl 6 (e) Toxicosis: organo- phosphorus compound NW
OH Milford 09/07/98- 10/01/98 Mallard 10 (e) Botulism type C NW
OH Wildwood Park 07/05/98- 07/05/98 Mallard, Domestic Pigeon (Rock Dove), Canada Goose, Domestic Duck 105 Toxicosis: strychnine NW
SD Collins Slough 04/13/98- 09/04/98 Mallard, Blue-winged Teal, Northern Pintail, Unidentified Shorebird, Unidentified Grebe 5,500 (e) Botulism suspect NW
SD Flight Lake 07/10/98- 09/04/98 Mallard, Northern Pintail 401 Botulism suspect NW
SD Hyde Slough 07/10/98- 09/04/98 Mallard, Blue-winged Teal, Northern Pintail, Unidentified Shorebird, Unidentified Duck 100 (e) Botulism suspect NW
SD Long Lake in Codington county 08/15/98- 09/04/98 Semipalmated Sandpiper, Pectoral Sandpiper, Lesser Yellowlegs, Northern Shoveler, Green-winged Teal 1,665 Botulism type C SD
SD Morelock's Slough 07/14/98- 09/20/98 Green-winged Teal, Mallard, Northern Pintail, Unidentified Shorebird 351 Botulism suspect NW
SD Sand Lake NWR 07/14/98- 09/20/98 Mallard, American Coot, Northern Pintail, Green-winged Teal 2,049 Botulism type C NW
SD Swan Lake 07/14/98- 09/20/98 Mallard, Northern Pintail, Unidentified Duck, Wood Duck Gadwall 146 Botulism suspect NW
UT Lake Desolation 08/15/98- 09/04/98 Tiger Salamander 300 (e) Iridovirus infection NW
UT Bear River MBR 07/07/98- 09/18/98 Green-winged Teal, Mallard, Northern Shoveler, Unidentified Sho headers="header5"rebird, Gadwall 10,532 Botulism type C NW
VA Richmond 06/01/98- 06/04/98 Unidentified Bird, Gray Squirrel 8 Toxicosis: bromadiolone, diphacinone SC
WA Water retention pond in Seattle 07/25/98- 10/15/98 Mallard 75 (e) Botulism type C NW
WA Twisp 05/01/98- 08/01/98 Pine Siskin, Purple Finch, Mourning Dove, House Sparrow 30 (e) Salmonellosis NW
WI Horicon NWR 09/09/98- 09/23/98 Green-winged Teal, Northern Shoveler, Mallard 250 (e) Botulism type C NW
WI Little Lake Butte Des Morts 09/14/98- 09/15/98 Mallard 50 (e) Botulism type C WI
WI Milwaukee Food Processing Plant 06/25/98- 06/30/98 Ring-billed Gull 146 Botulism type C NW
WI Private facility 08/15/98- 08/15/98 House Sparrow 432 Trauma: electrocution (storm) WI

(e) = estimate; * = morbidity and mortality

National Wildlife Health Center (NW); Southeastern Cooperative Wildlife Disease Study (SC); New York State Departmemt of Environmental Conservation (NY); California Department of Fish and Game-Wildlife Investigations Laboratory (CFG); Wisconsin Department of Natural Resources (WI); South Dakota State University: Brookings Laboratory (SD); New Mexico Veterinary Diagnostic Services (NM).

Written and compiled by Kathryn Converse, Kimberli Miller, Linda Glaser, Terry Creekmore, and Audra Schrader, National Wildlife Health Center (NWHC). To report mortality or if you would like specific information on these mortalities, contact one of the following NWHC staff: Western US Kathryn Converse; Eastern US--Kimberli Miller; Hawaiian Islands--Thierry Work. Phone (608) 270-2400, FAX (608) 270-2415 or E-mail kathy_converse@usgs.gov. National Wildlife Health Center, 6006 Schroeder Road, Madison, WI 53711.

Quarterly Mortality Reports

Avian botulism mortality in migratory water birds peaked during late summer and early fall. Mortality confirmed or suspected to be due to botulism was reported to the National Wildlife Health Center (NWHC) from more than 50 sites in 15 states by wildlife personnel from both federal and state agencies. The greatest number of botulism outbreaks occurred in North Dakota and the greatest number of dead birds were collected in that state.

Avian botulism occurred at many sites in the Prairie Pothole area of North and South Dakota where botulism outbreaks had not been reported for several years. Avian botulism occurred for a second year in Illinois at the Chautauqua NWR and the majority of the 2,600 dead birds collected were green and blue-winged teal. In the other states a wide variety of avian species were collected during outbreaks including 16 species of waterfowl, five species of shorebirds, five species of wading birds, grebes, coots, gulls and pelicans.

The highest mortality occurred in the dabbling ducks such as mallards, green-winged teal, blue-winged teal, northern pintail, northern shoveler, gadwall and American wigeon. However, many birds could not be identified to species because of decomposition. The total mortality reported to NWHC from botulism outbreaks was about 98,000 birds.

For additional information please contact Dr. Scott Wright, USGS National Wildlife Health Center - Disease Investigations Branch Chief, at 608-270-2460 or Paul Slota, USGS National Wildlife Health Center - Support Services Branch Chief at 608-270-2420.

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