National Wildlife Health Center

...advancing wildlife and ecosystem health

New and Ongoing Wildlife Mortality Events Nationwide

USGS and a network of partners across the country work on documenting wildlife mortality events in order to provide timely and accurate information on locations, species and causes of death.  This information is used by natural resource managers, researchers, public health officials and  legislators  to help design disease prevention and mitigation strategies, to address interconnections between human, domestic animal and wildlife disease, and to assist in identification of 'normal' disease issues vs. biosecurity concerns.

These data are not all-inclusive. Information on some outbreaks may not be received until months or years after the event, but efforts continue to make the information as complete as possible. For information on previous wildlife mortality events and events that used to be on this page, please see the Quarterly Mortality Reports.

New The Recent Mortality Events Map visualizes the data on this page in an interactive map. Watch for trends and filter events based on type and location.

For additional information on mortalities, contact the NWHC field epidemiology team at 608-270-2480 or

More information on reporting an event can be found at the event reporting page.

Date last updated : Aug 20, 2014

Mortality Begin Date End Date State County Species Diagnosis Estimated Mortality to Date Reported By
08/04/2014ongoingNDMOUNTRAILAmerican White PelicanOpen~ 50USGS NWHC
08/02/2014ongoingNDSTUTSMANDouble-crested Cormorant, Canada GooseViral Infection: Avian Paramyxovirus 1, Salmonellosis< 25USGS NWHC
08/01/2014ongoingMNBIG STONEUnidentified Gull, Double-crested Cormorant, American White PelicanOpen< 50USGS NWHC
08/01/2014ongoingMNCASSDouble-crested Cormorant, Unidentified GullOpen< 100USGS NWHC
07/26/2014ongoingCASACRAMENTOMallardBotulism type C< 25USGS NWHC
07/24/2014ongoingMDTALBOTDouble-crested CormorantOpen~ 150USGS NWHC
07/23/2014ongoingMIGRAND TRAVERSEMallardBotulism type C< 25MI Dept of Natural Resources
07/17/2014ongoingMNFILLMOREBig Brown BatOpen~ 50USGS NWHC
07/15/2014ongoingMNMEEKERDouble-crested Cormorant, American White PelicanOpen< 50USGS NWHC
07/15/201407/15/2014TNWILSONMallard, Hybrid Mallard Duck, Wood Duck, Unidentified Woodpecker, RaccoonToxicosis: carbofuran< 25SCWDS
07/13/201407/14/2014NMMCKINLEYBrown-headed Cowbird, Red-winged Blackbird, House SparrowOpen~ 200USGS NWHC
07/13/2014ongoingMABARNSTABLECommon TernOpen< 100USGS NWHC
07/07/201408/02/2014CASAN BERNARDINOHybrid Mallard DuckBotulism suspect< 25- other -
07/04/2014ongoingCASISKIYOUMallard, Green-winged Teal, American Coot, Unidentified Grebe, Unidentified DuckBotulism type C~ 1000USGS NWHC
07/02/2014ongoingVANEWPORT NEWSEvening BatOpen< 10USGS NWHC
07/01/2014ongoingWIVILASBullfrogViral Infection: Ranavirus suspect~ 300USGS NWHC
06/30/2014ongoingAZPIMAPallid Bat, Brazilian Free-tailed BatOpen, Rabies< 75USGS NWHC
06/26/201406/26/2014WAWHITMANCliff SwallowUnsuitable~ 200USGS NWHC
06/25/201406/25/2014WYLARAMIELark BuntingTrauma: weather suspect< 10USGS NWHC
06/22/2014ongoingMDTALBOTMallardBotulism type C~ 200USGS NWHC
06/22/2014ongoingPAWYOMINGBig Brown Bat, Northern Long-Eared BatTrauma suspect< 25USGS NWHC
06/20/201407/14/2014CASAN DIEGOCalifornia Least (Little) TernStarvation suspect< 50CA Animal Health/Food Safety L
06/20/201406/25/2014CAYUBAHybrid Mallard DuckBotulism suspect< 25- no diagnostics pursued -
06/18/2014ongoingAZMARICOPARosey-faced (Peach-faced) LovebirdChlamydiosis< 25USGS NWHC
06/17/2014ongoingUTSALT LAKEMallard, Canada GooseBotulism type C, Aspergillosis< 50USGS NWHC
06/17/201407/01/2014MIWAYNERing-billed GullSalmonellosis, Malnutrition, Trauma~ 300MI Dept of Natural Resources
06/07/201406/07/2014MNCARLTONDouble-crested CormorantTrauma: gunshot< 25USGS NWHC
06/01/2014ongoingMEYORKWood FrogUndetermined, Viral Infection: Ranavirus suspect< 25USGS NWHC
06/01/201406/15/2014NVCLARKMallardBotulism type C< 50USGS NWHC
05/26/2014ongoingPAMultiple CountiesBig Brown BatOpen~ 5USGS NWHC
05/26/2014ongoingMTMUSSELSHELL, GOLDEN VALLEYGreater Sage GrouseOpen< 10USGS NWHC
05/24/2014ongoingNEMULTIPLE COUNTIESCedar WaxwingToxicosis suspect< 25USGS NWHC
05/23/2014ongoingIAGREENESnapping Turtle, Painted Turtle, Blanding's TurtleOpen< 75USGS NWHC
05/23/2014ongoingIAHAMILTONSnapping TurtleOpen< 50- no diagnostics pursued -
05/18/2014ongoingDEKENTWood FrogViral Infection: Ranavirus~ 1000USGS NWHC
05/15/2014ongoingDENEW CASTLEWood Frog, American Toad, Unidentified Frog, Southern Leopard FrogViral Infection: Ranavirus~ 1000USGS NWHC
05/09/2014ongoingWITREMPEALEAUNorthern Leopard FrogOpen< 150USGS NWHC
05/08/201405/08/2014GALOWNDESNorthern CardinalSalmonellosis~ 50SCWDS
05/03/201405/05/2014DESUSSEXWood Frog, Bullfrog, Unidentified FrogOpen~ 1000USGS NWHC
05/03/201405/04/2014MTMADISONEared Grebe, American CootTrauma: impact~ 400USGS NWHC
05/02/2014ongoingPAMONROEBog Turtle, Undetermined< 25USGS NWHC
05/01/2014ongoingCAMultiple CountiesAmerican Crow, Western Scrub JayOpen~ 500USGS NWHC
04/28/201406/04/2014GATHOMASBrown-headed Cowbird, Northern Cardinal, Unidentified PasserineSalmonellosis< 25SCWDS
04/16/2014ongoingWILA CROSSEAmerican Coot, Lesser Scaup, Northern ShovelerParasitism: trematodiasis suspect< 250
04/15/2014ongoingWIBUFFALOAmerican Coot, Unidentified ScaupParasitism: trichomoniasis, Parasitism: Sphaeridiotrema globulus, Parasitism: Cyathocotyle bushiensi~ 100USGS NWHC
04/15/2014ongoingSCMultiple CountiesCommon (Black) Scoter, White-winged ScoterOpen~ 100USGS NWHC
04/11/2014ongoingMNHOUSTONAmerican Coot, Lesser Scaup, Bufflehead, Northern ShovelerParasitism: trematodiasis, Parasitism: Cyathocotyle bushiensis, Parasitism: Sphaeridiotrema sp.< 500USGS NWHC
04/01/201404/15/2014MIOTTAWAMute SwanStarvation suspect< 10- no diagnostics pursued -
04/01/201404/28/2014MIKEWEENAWLittle Brown BatFungal Infection: white-nose syndrome~ 50MI Dept of Natural Resources
03/29/201404/15/2014MIOTTAWACommon Merganser, Common Goldeneye, Double-crested CormorantStarvation suspect< 25- no diagnostics pursued -
03/29/201405/12/2014CASACRAMENTOMallardAvian cholera< 50CA Animal Health/Food Safety L
03/23/2014ongoingMIMACKINACLittle Brown BatFungal Infection: white-nose syndrome0MI Dept of Natural Resources, USGS NWHC
03/22/2014ongoingMIALPENALittle Brown BatFungal Infection: white-nose syndrome0MI Dept of Natural Resources, USGS NWHC
03/21/201404/15/2014CAMARINRough-skinned NewtViral Infection: Ranavirus suspect, Hepatitis< 100USGS NWHC
03/20/201404/08/2014TXORANGENorthern CardinalSalmonellosis< 50USGS NWHC
03/19/201403/19/2014PALANCASTERCommon GrackleToxicosis: chlorpyrifos< 25USGS NWHC
03/15/201404/15/2014MIMUSKEGONRed-breasted Merganser, Unidentified Scaup, White-winged Scoter, Greater ScaupStarvation suspect< 200- no diagnostics pursued -
03/10/201404/01/2014MIMASONCommon Goldeneye, Long-Tailed (AKA Oldsquaw) Duck, White-winged Scoter, Red-breasted MerganserStarvation, Trauma~ 300MI Dept of Natural Resources
03/10/201403/25/2014IAFREMONTLesser Snow GooseAvian cholera~ 75USGS NWHC
03/09/201403/13/2014MOBOONECommon GrackleTrauma< 10SCWDS
03/08/201403/11/2014WIMILWAUKEERed-breasted Merganser, Unidentified Goldeneye, Lesser ScaupEmaciation: starvation< 50USGS NWHC
03/07/201404/05/2014NEPHELPSSnow Goose, Canada Goose, Mallard, Northern Pintail, American WigeonAvian cholera< 600USGS NWHC
03/07/201404/15/2014MIMUSKEGONGreater Scaup, White-winged ScoterStarvation, Pulmonary congestion, Pulmonary edema< 25MI Dept of Natural Resources
03/06/201404/15/2014MOMARIONLittle Brown Bat, Northern Long-Eared BatFungal Infection: white-nose syndrome suspect0USGS NWHC
03/06/201403/06/2014ARGARLANDCedar WaxwingTrauma~ 10SCWDS
03/05/201404/02/2014WIMILWAUKEEUnidentified Merganser, Common Goldeneye, Unidentified Scaup, Ring-necked DuckStarvation suspect~ 150- no diagnostics pursued -
03/05/201404/02/2014WIDOORCommon Goldeneye, Unidentified Merganser, Unidentified Scaup, White-winged ScoterStarvation suspect~ 200- no diagnostics pursued -
03/05/201404/02/2014WIKENOSHAUnidentified DuckStarvation suspect~ 25- no diagnostics pursued -
03/05/201404/02/2014WIMANITOWOCUnidentified DuckStarvation suspect~ 25- no diagnostics pursued -
03/04/201404/15/2014GARABUNEastern Pipistrelle (AKA Tri-colored)Fungal Infection: white-nose syndrome< 50SCWDS
03/03/201403/03/2014PACRAWFORDAmerican Coot, Redhead DuckEmaciation: starvation suspect< 25USGS NWHC
03/02/201403/11/2014TXMILAMBrazilian Free-tailed BatEmaciation: starvation suspect< 150USGS NWHC
03/02/201403/04/2014SDBEADLEAmerican RobinEmaciation: starvation< 25USGS NWHC
03/02/201404/30/2014ORPOLKCackling Goose, Herring Gull, Mew GullAspergillosis, Toxicosis: zinc phosphide suspect~ 50OR State Diagnostic Lab
03/01/201404/30/2014WIGRANTNorthern Long-Eared Bat, Little Brown BatFungal Infection: white-nose syndrome0USGS NWHC
03/01/201403/18/2014IAWOODBURYMallard, Unidentified Avian, Canada Goose, American Coot, Green-winged TealAvian cholera< 150USGS NWHC
03/01/201403/03/2014CASANTA CRUZAmerican CootDrowning, Toxicosis suspect< 150USGS NWHC
02/27/2014ongoingMIDICKINSONLittle Brown BatFungal Infection: white-nose syndrome0MI Dept of Natural Resources, USGS NWHC
02/26/201404/15/2014MOIRONNorthern Long-Eared BatFungal Infection: white-nose syndrome< 10USGS NWHC
02/26/201404/13/2014WAKLICKITATRed Crossbill, Varied ThrushTrauma: impact< 10USGS NWHC
02/25/201403/07/2014ORLAKELesser Snow GooseAvian cholera~ 100OR State Diagnostic Lab
02/25/201403/13/2014CAIMPERIALDouble-crested CormorantAvian cholera~ 50USGS NWHC
02/24/201404/09/2014IDCANYONLesser Snow Goose, Greater Snow Goose, Ring-necked Duck, Unidentified Scaup, Greater White-fronted GooseAvian cholera suspect~ 400ID Wildlife Health Lab
02/22/201404/15/2014MIMUSKEGONGreater ScaupStarvation, Pulmonary congestion, Pulmonary edema< 25MI Dept of Natural Resources
02/21/201403/19/2014MIWAYNEMute Swan, Canvasback, Unidentified Scaup, Tundra Swan, Common MerganserStarvation, Drowning< 450MI Dept of Natural Resources
02/19/201402/21/2014OHERIERed-breasted Merganser, Canvasback, Canada Goose, Mute Swan, American Black DuckEmaciation: starvation suspect< 25USGS NWHC
02/19/201403/15/2014ARPULASKIBrazilian Free-tailed BatUndetermined, Emaciation, Trauma< 150USGS NWHC
02/18/201404/15/2014MOPULASKIEastern Pipistrelle (AKA Tri-colored), Little Brown BatFungal Infection: white-nose syndrome suspect0USGS NWHC
02/18/201404/15/2014MOCAMDENEastern Pipistrelle (AKA Tri-colored)Fungal Infection: white-nose syndrome< 5USGS NWHC
02/15/201402/20/2014LATERREBONNEAmerican CootAvian cholera~ 200USGS NWHC
02/15/201403/01/2014KSJEWELLMallardAvian cholera~ 150SCWDS
02/15/201404/02/2014WIMILWAUKEEUnidentified Scaup, Common Merganser, Ring-necked Duck, Common Loon, Canada GooseEmaciation: starvation~ 200WI Dept of Natural Resources
02/11/201404/15/2014CASISKIYOULesser Snow Goose, American Wigeon, Ross' Goose, Northern Pintail, Greater White-fronted GooseAvian cholera~ 3500USGS NWHC
02/09/201402/09/2014MDQUEEN ANNESUnidentified BlackbirdTrauma suspect~ 100- no diagnostics pursued -
02/09/2014ongoingCAMultiple CountiesMourning DoveParasitism: trichomoniasis suspect~ 150CA Fish & Game Disease Lab
02/08/201404/15/2014MIOTTAWAWhite-winged Scoter, Red-breasted Merganser, Long-Tailed (AKA Oldsquaw) Duck, Mute Swan, Horned GrebeStarvation, Pulmonary congestion, Pulmonary edema< 50MI Dept of Natural Resources
02/06/201404/15/2014MOLACLEDENorthern Long-Eared Bat, Gray Bat, Eastern Pipistrelle (AKA Tri-colored), Big Brown BatFungal Infection: white-nose syndrome suspect0USGS NWHC
02/04/201402/05/2014MDTALBOTRuddy Duck, Redhead Duck, Lesser Scaup, CanvasbackEmaciation, Parasitism< 75MD Dept of Agriculture, USGS NWHC
02/04/201402/12/2014VA / MDWESTMORELAND / CHARLES, ST MARYSRuddy Duck, Double-crested CormorantEmaciation, Parasitism: Nematodiasis< 150MD Dept of Agriculture, USGS NWHC
02/03/201403/10/2014CAFRESNOUnidentified GullUndetermined< 25CA Animal Health/Food Safety L
02/03/201402/03/2014GASTEPHENSAmerican Crow, Canada Goose, Field Sparrow, Unidentified Crow, Turkey (Wild)Toxicosis: Famphur, Trauma< 25SCWDS
02/01/2014ongoingHIMultiple CountiesCollector Sea Urchin (T. gratilla)OpenunknownUSGS NWHC - Honolulu
02/01/201404/15/2014NY / PACHAUTAUQUA, ERIE / ERIERed-breasted Merganser, American Coot, Greater Scaup, MallardEmaciation: starvation suspect~ 1500USGS NWHC, NY Dept Env Cons
02/01/201404/15/2014MIGRAND TRAVERSEUnidentified Waterfowl, Greater Scaup, Red-breasted Merganser, Mute Swan, White-winged ScoterStarvation, Trauma~ 200MI Dept of Natural Resources
01/28/201401/29/2014MTTETONMallardTrauma< 25USGS NWHC
01/28/201401/28/2014CAEL DORADOBrewer's BlackbirdToxicosis: strychnine< 25CA Animal Health/Food Safety L
01/27/201401/28/2014CAEL DORADOWhite-crowned Sparrow, Golden-crowned SparrowUndetermined< 50CA Animal Health/Food Safety L
01/25/201401/28/2014AZMOHAVEEurasian Collared DoveViral Infection: Avian Paramyxovirus 1< 10USGS NWHC
01/24/201401/26/2014MSPANOLACommon Grackle, Brown-headed CowbirdToxicosis suspect~ 1000USGS NWHC
01/23/201402/04/2014OHHOCKINGNorthern Long-Eared BatFungal Infection: white-nose syndrome< 5USGS NWHC
01/23/201401/23/2014GAGLYNNEastern Brown PelicanEmaciation: starvation suspect, Trauma< 10SCWDS
01/17/201403/20/2014OHFRANKLINBig Brown BatFungal Infection: white-nose syndrome0USGS NWHC
01/15/201404/15/2014MIBENZIE, LEELANAUUnidentified Duck, White-winged Scoter, Long-Tailed (AKA Oldsquaw) Duck, Double-crested Cormorant, Unidentified PasserineStarvation suspect< 100- no diagnostics pursued -
01/15/201402/20/2014CALAKERuddy Duck, American CootAvian cholera suspect< 75- no diagnostics pursued -
01/15/201401/20/2014AZMARICOPAUnidentified Pigeon, Unidentified Dove, Great-tailed Grackle, Mourning Dove, Inca DoveToxicosis: strychnine< 25USGS NWHC
01/15/201402/24/2014NJCUMBERLANDMourning Dove, Northern Mockingbird, Red-winged Blackbird, Common Grackle, Unidentified PasserineToxicosis: carbon monoxide suspect~ 25USGS NWHC
01/15/201402/25/2014VASURRYBrown PelicanUndetermined~ 50USGS NWHC
01/15/201404/15/2014NYWAYNERed-breasted MerganserOpen: emaciation/starvationunknownNY Dept Env Cons
01/14/201404/15/2014MODALLASLittle Brown BatFungal Infection: white-nose syndrome0USGS NWHC
01/13/201401/30/2014NEMERRICKMallardAvian cholera< 150USGS NWHC
01/12/201404/01/2014ARMARIONNorthern Long-Eared BatFungal Infection: white-nose syndrome< 10USGS NWHC
01/09/201402/12/2014CASAN DIEGOBand-tailed PigeonParasitism: trichomoniasis~ 200CA Fish & Game Disease Lab
01/09/201401/09/2014LAAVOYELLESWood Duck, Northern PintailUndetermined< 25SCWDS
01/03/201401/03/2014LAJEFFERSON DAVISBrown-headed CowbirdUndetermined, Trauma suspect~ 250SCWDS
01/03/201402/14/2014CASONOMAVaried ThrushAspergillosis< 10CA Animal Health/Food Safety L
01/02/201401/02/2014MIALCONAMallardAspergillosis< 25MI Dept of Natural Resources
01/01/201401/02/2014ORMORROWAmerican CrowUndetermined~ 100USGS NWHC
01/01/201401/01/2014KSMONTGOMERYRed-winged BlackbirdTrauma< 25USGS NWHC

Explanation of fields:

Mortality begin date is the date the mortality began -- for most wildlife disease events, this is an estimate only, as carcasses may not be noticed immediately.

End date is again usually an estimate of the last day new carcasses were found.

State and country identify the area in which the mortality is occurring.  NOTE:  avian mortality events may cover several counties and possibly multiple states given the migratory nature of many species.

Species shown on the table include up to 5 of the species involved in the event.  In some cases, group identifiers like 'waterfowl' or 'shorebirds' have been used instead of specific names when a large number of different species are involved.

Diagnosis includes a final diagnosis, if known, with no qualifiers; a suspected diagnosis once preliminary investigations have been made; or an indication that tests are still in process.  NOTE:  In some instances, where mortality occurred but no specimens were sent to NWHC or another diagnostic laboratory or -- in rare instances -- where tests could not definitely identify a trigger for the mortality, the cause of death may never be determined.  Such events are identified with the word 'undetermined' in the diagnosis column.

The estimated mortality provides some indication of the severity of the event.  Numbers may change rapidly from one week to the next.

The 'reported by' field indicates the lab(s) or agencies who reported or are working on the mortality event.

USGS NWHC = USGS National Wildlife Health Center
USDA NVSL = USDA National Veterinary Services Lab
SCWDS = Southeastern Cooperative Wildlife Disease Study

NOTE: If you find a dead bird, mammal, reptile or amphibian, please contact your state natural resource agency first.  They will know the proper reporting procedures for your area.  Contact information may be found online or in the government pages of your local telephone book.

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