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National Wildlife Health Center

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USGS National Wildlife Health Center
Quarterly Wildlife Mortality Report
April 1995 to June 1995

Location Dates Species Mortality Diagnosis Reported
AZ Sun City West 06/05/95-06/19/95 House Finch; Mourning Dove 5 Parasitism: trichomoniasis NW
CA San Diego 03/25/95-03/29/95 Ringed Teal; Falcated Teal 2 Duck Plague NW
CA San Mateo, San Francisco 04/01/95-07/15/95 Surf Scoter 100 (e) Parasitism: acanthocephaliasis NW;CA
CA Mono Lake 04/29/95-04/30/95 Eared Grebe 683 Open NW
CA Lower Klamath NWR 06/01/95-06/30/95 American White Pelican; Western Grebe 60 (e) Botulism type C NW
FL Florida Keys 02/20/95-03/15/95 Double-crested Cormorant 25 (e) Emaciation NW
GA Warner Robins 02/10/95-02/14/95 American Robin; Blue Jay 24 Toxicosis: chlorpyrifos (Dursban) SC
GA Augusta 02/13/95-02/14/95 American Robin; Common Grackle 20 (e) Toxicosis: chlorpyrifos (Dursban) SC
HI Oahu 11/01/94-01/03/95 Wedge-tailed Shearwater 1,100 (e) Weather suspect NW-HF
ID Kootenai County 06/08/95-06/12/95 Violet-green Swallow 12 Open NW
IL Crab Orchard NWR 04/09/95-04/09/95 Double-crested Cormorant 20 Trauma NW
IL Island Lake 05/24/95-05/25/95 Canada Goose 8 Botulism suspect IL
IL Dupage County 04/06/95-04/10/95 Canada Goose 2 Open IL
IL Schaumburg 06/23/95-06/25/95 Mallard 6 Botulism suspect IL
IN Nappanee 06/23/95-07/27/95 Purple Martin 215 (e) Botulism type C; Starvation NW
MA Brockton 04/23/95-04/24/95 Mallard; Canada Goose 33 Open, no submission NW
MD Cambridge 04/24/95-04/30/95 Muscovy Duck 12 Duck plague MD
MD Suffolk County 06/21/95-06/25/95 Northern Gannet 6 Aspergillosis TS
ME Green Island 06/05/95-07/13/95 Great Black-backed Gull; Herring Gull 7 Emaciation NW
ME Winthrop 05/31/95-06/05/95 Muskrat 3 Tyzzer's Disease NW
MI Lenawee County 05/24/95-06/23/95 Muscovy Duck; Unidentified Domestic Duck; Unidentified Domestic Goose 35 Duck plague RL
MN Rice Lake NWR 04/27/95-05/18/95 Double-crested Cormorant; Ring-billed Gull; American White Pelican; Lesser Scaup; Pied-billed Grebe 184 Open NW
MN Blackduck 03/01/95-04/01/95 Pine Siskin 7 Salmonellosis NW
MN Nett Lake 05/25/95-05/25/95 Beaver 15 (e) Open, no submission
MT Ninepipe NWR 04/28/95-05/01/95 Common Raven 3 Toxicosis: organophosphorus compound NW
NC Outer Bank Islands 06/24/95-07/17/95 Greater Shearwater; Great Black-backed Gull; Cory's Shearwater 150 (e) Emaciation NW
ND McIntosh County 06/15/95-07/20/95 Eared Grebe 138 Predation NW
ND Kulm WMD 06/26/95-ongoing Franklin's Gull; Northern Pintail; Green-winged Teal; American Avocet; Mallard 500 (e) Botulism type C NW
NE Alliance 04/25/95-05/05/95 Yellow-headed Blackbird; Common Grackle; European Starling 30 Toxicosis: strychnine NW
NM Deming 05/16/95-07/20/95 Mourning Dove 300 (e) Parasitism: trichomoniasis NW
OK Bristow 03/26/95-03/26/95 American White Pelican 39 Trauma: storm NW
OR Corvallis 04/01/95-04/30/95 Pine Siskin 10 (e) Salmonellosis (S. typhimurium) NW
PA Kingston, Dallas 06/20/95-06/21/95 Gray Catbird; Turkey 3 Open NW
RI Charlestown 05/20/95-07/13/95 Canada Goose; Domestic Turkey 14 Conjunctivitis NW
SD Swan Lake, Walworth County 04/15/95-04/20/95 Lesser Scaup 20 Open NW
TX Hale County Playa 12/05/94-02/01/95 Northern Pintail; Canada Goose; Snow Goose; Mallard 27 Avian cholera suspect NW
TX Garland 05/26/95-06/21/95 Muscovy Duck; Pekin Duck; Hybrid Mallard 58 Duck plague NW
VA Virginia Beach 05/15/95-06/01/95 Muscovy Duck 13 Duck plague NW
VA Sterling 04/08/95-04/12/95 European Starling; Gray Squirrel 14 Trauma: gunshot SC
WA Ridgefield NWR 04/12/95-04/12/95 Canada Goose; Cackling Canada Goose; Taverner's Canada Goose 5 Trauma: impact NW
WI DePere 05/04/95-05/04/95 Mallard 2 Toxicosis: Avitrol WI

(e) = estimate; * = morbidity and mortality

*National Wildlife Health Center (NW); Illinois Department of Conservation (IL); Maryland Department of Agriculture (MD); Tri-State Bird Rescue and Research - Newark, Deleware (TS); Southeastern Cooperative Wildlife Disease Study (SC); Wisconsin Department of Natural Resources (WI); Rose Lake Wildlife Disease Laboratory - Michigan (RL); California Department of Fish and Game - Wildlife Investigations Laboratory (CA); National Wildlife Health Center - Hawaiian Field Station (NW-HF).

Written and compiled by Gregory Kidd, NWHC. The Quarterly Wildlife Mortality Report is available at http://www.nwhc.usgs.gov. To report mortality or receive information about this report, contact the above NWHC staff, e-mail: kathy_converse@usgs.gov., or for Hawaiian Islands contact Thierry Work. Phone: (608) 270-2400, FAX: (608) 270-2415 or write USGS National Wildlife Health Center, 6006 Schroeder Road, Madison, WI 53711.

Quarterly Mortality Reports

Duck plague was seen at several locations this spring. In late March, duck plague was reported in two out of nineteen exotic waterfowl species in a private waterfowl collection in San Diego. The diagnosis was based on histopathology. All unaffected birds were immediately moved into quarantine, the pond drained and disinfected, and the only free-flying birds present on the pond were euthanized. Duck plague was diagnosed in a muscovy duck from a private collection in Cambridge, Maryland by the Maryland Department of Agriculture with virus confirmation by the NWHC. Duck plague was confirmed in one of 13 muscovy collected in Virginia Beach, Virginia. Mortality in muscovy ducks was reported from several additional sites in Virginia Beach but no suitable carcasses were submitted for evaluation. There have been several outbreaks of duck plague in the Virginia Beach area in recent years. Duck plague was diagnosed by the Michigan Roselake Wildlife Research Center in domestic ducks on a farm in Onsted, Michigan; an estimated 35 ducks died and no wild birds were known to use the area. The Texas Veterinary Medical Diagnostic lab reported the presence of gross and microscopic lesions consistent with duck plague in muscovy carcasses collected on a residential pond in Garland, Texas; NWHC isolated duck plague virus. Duck plague occurred at this site in 1994. Texas Parks and Wildlife requested homeowners collect and dispose of carcasses and monitor the site for further mortality.

Maine Inland Fisheries and Wildlife reported the death of 3 muskrats on a residential lake in Kennebunk County. Several muskrats were seen dead in the same area last fall. There was concern that this mortality was linked to contamination from a nearby Superfund cleanup site. Necropsy evaluation of the muskrats revealed tissue changes consistent with a bacterial infection. Tyzzer's disease was confirmed by examination of specially stained tissues that contained Bacillus piliformis.

The Purple Martin Conservation Association reported mortality in purple martin colonies in three states, Kansas, Indiana, and Pennsylvania. At the Indiana site, there were two peaks of mortality. Between June 22 and June 25, 60 adults and 107 young died and during the second peak, July 23 to July 27, 40 adults and several young died. Over 90 % of the adults in the colony died. Two shipments of purple martins were examined by NWHC. The adults were in good body condition with no significant lesions. Young birds were emaciated and were presumed to have died of dehydration and starvation following the death of their parents. Botulism type C toxin was confirmed in three birds, cholinesterase levels appeared normal, and there were no significant bacterial or viral isolations. Additional tests are pending.

Trichmonas gallinae was isolated from esophageal lesions in house finches and a mourning dove collected from a residential area of Phoenix, Arizona and mourning doves from a larger mortality event in southwestern New Mexico. Trichomoniasis is common in doves but is rarely reported in house finches. In New Mexico, doves congregate at cattle watering tanks and drink overflow water from the ground. Doves were found sick or dead at roosting sites and near cattle watering tanks. Transmission of this parasite is usually associated with concentrations of birds in an area where ground feeding occurs.

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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