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

  • Western U.S.: Barb Bodenstein, 608-270-2447,
  • Central U.S.: Dr. LeAnn White, 608-270-2491,
  • Eastern U.S.: Dr. Anne Ballmann, 608-270-2445,
  • Hawaii, Pacific Islands: Dr. Thierry Work, 808-792-9520,
  • Nationwide, single animal cases only: Jennifer Buckner, 608-270-2443,

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

Date last updated : Feb 18, 2014

Mortality Begin Date End Date State County Species Diagnosis Estimated Mortality to Date Reported By
02/04/2014ongoingMDTALBOTRuddy Duck, Redhead Duck, Lesser Scaup, CanvasbackOpen: emaciation< 75USGS NWHC
01/28/201401/29/2014MTTETONMallardTrauma< 25USGS NWHC
01/25/2014ongoingAZMOHAVEEurasian Collared DoveViral Infection: pigeon paramyxovirus 1< 10USGS NWHC
01/24/2014ongoingMSPANOLACommon Grackle, Brown-headed CowbirdOpen: toxicosis suspect~ 1000USGS NWHC
01/15/2014ongoingAZMARICOPAUnidentified Pigeon, Unidentified Dove, Great-tailed Grackle, Mourning Dove, Inca DoveToxicosis suspect< 25USGS NWHC
01/14/2014ongoingMODALLASLittle Brown BatFungal Infection: white-nose syndrome0USGS NWHC
01/13/2014ongoingNEMERRICKMallardAvian cholera< 100USGS NWHC
01/12/2014ongoingARMARIONNorthern Long-Eared BatFungal Infection: white-nose syndrome< 10USGS NWHC
01/02/201401/02/2014MIALCONAMallardAspergillosis< 25MI Dept of Natural Resources
01/01/201401/02/2014ORMORROWAmerican CrowUndetermined~ 100USGS NWHC
01/01/2014ongoingKSMONTGOMERYRed-winged BlackbirdTrauma< 25USGS NWHC
12/31/2013ongoingCASAN JOAQUINRoss' Goose, Aleutian Canada GooseUndetermined< 150- no diagnostics pursued -
12/30/2013ongoingCASAN JOAQUINAmerican Coot, Killdeer, Black-necked Stilt, Northern Shoveler, Greater White-fronted GooseAvian cholera suspect~ 200CA Animal Health/Food Safety L
12/26/201312/26/2013UTUTAHEurasian Collared DoveViral Infection: Avian Paramyxovirus 1, Airsacculitis~ 50USGS NWHC
12/23/201301/31/2014CASAN MATEOGreen-winged Teal, Northern Shoveler, Ruddy Duck, American Coot, Canada GooseAvian cholera< 400USGS NWHC
12/14/201312/18/2013UTSALT LAKENorthern ShovelerTrauma: impact~ 200USGS NWHC
12/12/2013ongoingWAWHATCOMTrumpeter Swan, American Wigeon, Green-winged Teal, MallardAspergillosis, Lead poisoning~ 300USGS NWHC
12/12/201312/12/2013VAPRINCE WILLIAMEuropean StarlingTrauma: impact~ 100USGS NWHC
12/03/201312/13/2013OHSANDUSKYRing-billed GullUndetermined< 75USGS NWHC
12/03/2013ongoingMOJACKSONEastern Pipistrelle (AKA Tri-colored)Fungal Infection: white-nose syndrome0USGS NWHC
11/28/2013ongoingUTMULTIPLE COUNTIESBald EagleViral Infection: West Nile< 75USGS NWHC
11/18/2013ongoingAKNOMECrested Auklet, Thick-billed Murre, Northern Fulmar, Glaucous GullAvian cholera, Salmonellosis~ 300USGS NWHC
11/13/201312/31/2013NMLEAEurasian Collared DoveViral Infection: Avian Paramyxovirus 1~ 100USGS NWHC
11/11/201301/31/2014UTBOX ELDEREared GrebeViral Infection: West Nile~ 20000USGS NWHC
11/09/201311/11/2013WASNOHOMISHMallardAspergillosis~ 300USGS NWHC
11/07/2013ongoingMNITASCALesser ScaupParasitism: trematodiasis, Parasitism: Cyathocotyle bushiensis, Parasitism: Sphaeridiotrema sp.< 10USGS NWHC
10/29/2013ongoingNYJEFFERSON, OSWEGOCommon Loon, Long-Tailed (AKA Oldsquaw) Duck, Herring Gull, Red-necked Grebe, Great Black-backed GullBotulism suspect~ 300- no diagnostics pursued -
10/29/201310/29/2013NMSAN MIGUELAmerican CrowTrauma: gunshot< 10USGS NWHC
10/24/2013ongoingWILA CROSSEAmerican CootParasitism: trematodiasis, Parasitism: Cyathocotyle bushiensis, Parasitism: Leyogonimus polyoon~ 50USGS NWHC
10/24/2013ongoingMNHOUSTONAmerican Coot, Lesser ScaupParasitism: trematodiasis, Parasitism: Cyathocotyle bushiensis, Parasitism: Leyogonimus polyoon~ 200USGS NWHC
10/22/201310/22/2013TXECTORWhite-winged DoveToxicosis: strychnine, Trauma< 10USGS NWHC
10/21/201311/04/2013CAMADERAAmerican Coot, Ruddy Duck, Unidentified SandpiperBotulism suspect~ 200- no diagnostics pursued -
10/15/201311/15/2013MOMONROEAmerican White PelicanUndetermined< 25- no diagnostics pursued -
10/11/201310/17/2013ORMULTNOMAHBullfrogUndetermined~ 3500OR State Diagnostic Lab, San Diego Zoo Diagnostic Lab
09/30/201310/03/2013ORMULTIPLE COUNTIESUnidentified Swallow, Violet-Green Swallow, Barn Swallow, Tree Swallow, Vaux's SwiftStarvation~ 1350OR State Diagnostic Lab
09/30/2013ongoingWACLARKGadwall, Unidentified Scaup, American Coot, American Wigeon, MallardBotulism type C~ 100USGS NWHC
09/25/201310/09/2013TXMIDLANDWhite-winged DoveToxicosis: strychnine, Trauma< 25USGS NWHC
09/01/201312/01/2013AZYUMAEurasian Collared Dove, White-winged Dove, Mourning DoveViral Infection: pigeon paramyxovirus 1, Toxicosis: ethanol, Toxicosis: Avitrol~ 200USGS NWHC
09/01/201312/31/2013TXLUBBOCKEurasian Collared Dove, Rock Dove, White-winged DoveToxicosis: carbamate compound, Toxicosis: ethanol, Viral Infection: pigeon paramyxovirus 1~ 200USGS NWHC
09/01/2013ongoingWILANGLADERed-tailed HawkGout< 25USGS NWHC
07/01/2013ongoingAtlantic Coast NY-FLMULTIPLE COUNTIESBottlenose DolphinViral Infection: Morbillivirus, Brucellosis< 1000NOAA
06/25/201311/22/2013MIBENZIE, LEELANAURed-breasted Merganser, Ring-billed Gull, Double-crested Cormorant, White-winged Scoter, Long-Tailed (AKA Oldsquaw) DuckBotulism type E< 500USGS NWHC
06/24/201310/04/2013MDTALBOTMallard, Black-necked Stilt, Red-winged Blackbird, Great Blue Heron, Double-crested CormorantBotulism type C, Bacterial infection: Riemerella anatipestifer< 350USGS NWHC, SCWDS
06/12/201308/30/2103INALLENMallard, Canada Goose, Domestic DuckBotulism type C< 300USGS NWHC
04/01/2013ongoingNEHALLUnidentified Sandhill CraneBacterial infection suspect< 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 'open' 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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