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 : Jan 14, 2015

Mortality Begin Date End Date State County Species Diagnosis Estimated Mortality to Date Reported By
01/08/2015ongoingNESCOTTS BLUFFMallardOpen< 25USGS NWHC
01/05/2015ongoingCAHUMBOLDTAmerican Coot, American Wigeon, Ruddy Duck, Northern Pintail, MallardOpen~ 600USGS NWHC
01/02/2015ongoingILFAYETTELesser Snow Goose, Mallard, Ross' GooseOpen~ 100USGS NWHC
01/01/2015ongoingMSTALLAHATCHIELesser Snow Goose, Green-winged Teal, Northern Pintail, Mallard, Greater White-fronted GooseOpen< 75USGS NWHC
01/01/2015ongoingCAIMPERIALDouble-crested Cormorant, Unidentified Gull, Northern Shoveler, Ruddy Duck, Brown PelicanAvian cholera suspect< 250USGS NWHC
12/31/201401/01/2015ARWHITEMallard, Green-winged Teal, Northern PintailOpen< 300USGS NWHC
12/29/2014ongoingILMASONLesser Snow Goose, Greater White-fronted GooseOpen~ 50USGS NWHC
12/28/2014ongoingFLMONROETurkey VultureOpen< 50USGS NWHC
12/25/2014ongoingTXOCHILTREEEurasian Collared DoveViral Infection: Avian Paramyxovirus 1~ 50USGS NWHC
12/21/2014ongoingWA / ORGRAYS HARBOR / LINCOLNCassin's AukletOpen: emaciation/starvation~ 2000USGS NWHC
12/05/2014ongoingNVMINERALAmerican Coot, American Wigeon, Northern Shoveler, Redhead Duck, Ruddy DuckAvian cholera~ 1000USGS NWHC
12/01/2014ongoingCASTANISLAUS, MERCEDRoss' Goose, Gadwall, Northern Pintail, Aleutian Canada Goose, American CootAvian cholera< 100USGS NWHC
12/01/2014ongoingWAWHATCOMMallard, American Wigeon, Northern Pintail, Northern Shoveler, Ruddy DuckAspergillosis, Avian influenza, Emaciation< 150USGS NWHC
11/26/201412/15/2014UTSALT LAKEEared Grebe, Unidentified GullAvian cholera~ 6000USGS NWHC
11/26/2014ongoingAZMARICOPAGreat-tailed Grackle, Western Screech OwlTrauma: impact, Toxicosis suspect< 25USGS NWHC
11/24/2014ongoingAZMARICOPAMourning Dove, Unidentified GrackleToxicosis: strychnine< 25USGS NWHC
11/21/2014ongoingCASUTTERRoss' Goose, American Wigeon, Lesser Snow GooseAvian cholera< 5USGS NWHC
11/15/2014ongoingNMSOCORROSnow Goose, Ross' Goose, American Coot, Northern Pintail, MallardAvian cholera suspect~ 3000- no diagnostics pursued -
11/10/201412/05/2014TXHIDALGOEurasian Collared DoveViral Infection: pigeon paramyxovirus 1< 50USGS NWHC
11/03/201411/12/2014FLPINELLASRed Knot, Unidentified GullUndetermined, Emaciation< 25USGS NWHC
11/01/201411/06/2014LAOUACHITAAmerican Coot, Gadwall, Green-winged Teal, Unidentified DuckTrauma~ 150USGS NWHC
10/31/201411/15/2014NYCHAUTAUQUA, ERIECommon Loon, Herring Gull, Great Black-backed Gull, Bonaparte's Gull, Long-Tailed DuckBotulism suspect< 900NY Dept Env Cons
10/29/201410/31/2014PACHESTERCanada GooseEsophageal impaction: bean, Necrotic esophagitis< 10USGS NWHC
10/26/2014ongoingORCOOSCassin's Auklet, Sooty Shearwater, Brandt's Cormorant, Common Murre, Western GullEmaciation, Plastic ingestion< 50USGS NWHC
10/15/201411/22/2014WILA CROSSEAmerican Coot, Lesser ScaupParasitism: trematodiasis, Parasitism: Leyogonimus polyoon, Parasitism: Cyathocotyle bushiensis< 350USGS NWHC
10/15/201410/15/2014OHMEDINAGreen FrogTrauma, Parasitism~ 200USGS NWHC
10/12/201410/31/2014MDDORCHESTERDiamondback TerrapinUndetermined~ 200USGS NWHC
10/07/2014ongoingMDKENTMallardUndetermined, Anemia, Airsacculitis~ 250USGS NWHC
10/06/2014ongoingCASONOMA, SAN LUIS OBISPO, MONTEREYCassin's AukletEmaciation~ 150USGS NWHC
10/03/201410/10/2014UTDAVISEared GrebePredation, Botulism type C< 25USGS NWHC
10/01/201410/29/2014NVWASHOEMallard, GadwallBotulism type C< 10USGS NWHC
10/01/201410/31/2014UTUTAHMallard, DogBotulism suspect, Toxicosis: blue-green algae suspect~ 100CA Animal Health/Food Safety Lab, UT Vet Diagnostic Lab
09/20/201410/31/2014ORMULTIPLE COUNTIESCommon Murre, Rhinoceros AukletEmaciation: starvation suspect, Avian pox suspectunknownUSGS NWHC, OR State Diagnostic Lab
09/14/201410/14/2014AZYAVAPAIGambel's QuailEnteritis, Emaciation~ 10USGS NWHC
09/07/201411/25/2014TXHOCKLEYHouse Sparrow, Unidentified Hawk, Long-billed ThrasherTrauma, Toxicosis suspect~ 100USGS NWHC
09/06/201411/22/2014MNHOUSTONAmerican Coot, Lesser ScaupParasitism: trematodiasis, Parasitism: Leyogonimus polyoon, Parasitism: Cyathocotyle bushiensis< 150USGS NWHC
09/02/201410/28/2014IDPAYETTEGreen-winged Teal, Unidentified Duck, American Coot, Unidentified Avian, Great Horned OwlBotulism type C~ 50USGS NWHC
08/18/201410/15/2014AZMOHAVEEurasian Collared Dove, Rock DoveViral Infection: pigeon paramyxovirus 1 suspect, Undetermined, Trauma: impact~ 150USGS NWHC
08/04/201410/04/2014NDMOUNTRAILAmerican White PelicanViral Infection: West Nile, Aspergillosis~ 50USGS NWHC
08/02/201410/31/2014NDSTUTSMANDouble-crested Cormorant, Canada GooseViral Infection: virulent Newcastle Disease, Salmonellosis, Aspergillosis~ 50USGS NWHC
08/01/201410/23/2014NVWASHOEMallard, Unidentified Gull, Common Merganser, Green-winged TealBotulism type C< 25USGS NWHC
07/26/201410/08/2014CASACRAMENTOMallard, Hybrid Mallard DuckBotulism type C< 100USGS NWHC
07/25/201410/17/2014MDTALBOTDouble-crested CormorantSalmonellosis, Necrotic enteritis, Emaciation< 300USGS NWHC
07/14/201412/16/2014NVELKOEurasian Collared DoveViral Infection: pigeon paramyxovirus 1~ 75USGS NWHC
07/04/201410/04/2014CASISKIYOUMallard, Green-winged Teal, Northern Pintail, Northern Shoveler, Unidentified AvianBotulism type C< 6850USGS NWHC
06/27/201411/08/2014MILEELANAU, BENZIECommon Loon, White-winged Scoter, Double-crested Cormorant, Ring-billed Gull, Long-Tailed DuckBotulism type E< 100USGS NWHC
06/01/2014ongoingCALOS ANGELESWestern Pond Turtle, Red-Eared Slider TurtleEmaciation: starvation suspect, Bacterial pneumonia and septicemia, Emaciation: anemia< 350USGS NWHC
05/01/201411/20/2014CAMULTIPLE COUNTIESAmerican Crow, Western Scrub Jay, Yellow-billed Magpie, Steller's Jay, Common RavenViral Infection: West Nile, Undetermined, Aspergillosis~ 700CA Animal Health/Food Safety Lab, USGS NWHC
02/09/201411/13/2014CAFRESNO, KERNMourning DoveParasitism: trichomoniasis< 200CA Fish & Game Disease Lab
01/06/2014ongoingILALEXANDERLesser Snow GooseAvian cholera suspect< 5USGS 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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Page Last Modified: Jul 14, 2014