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 Wildlife Health Information Sharing Partnership - event reporting system (WHISPers) has tools designed to query, map, sort, and download event data. WHISPers hosts data for both historic and ongoing wildlife mortality events.

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 : Apr 08, 2015

Mortality Begin Date End Date State County Species Diagnosis Estimated Mortality to Date Reported By
03/28/2015ongoingAKKENAI PENINSULACommon MurreOpen< 10USGS NWHC
03/25/2015ongoingNMSIERRAChiricahua Leopard FrogOpen< 10USGS NWHC
03/25/2015ongoingAZMARICOPANorthern Shoveler, Cinnamon Teal, American Wigeon, Gadwall, MallardOpen~ 50USGS NWHC
03/24/201503/31/2015FLWAKULLAPig Frog, Southern Leopard FrogOpen< 25USGS NWHC
03/24/2015ongoingWAWHATCOMDouble-crested CormorantOpen< 75USGS NWHC
03/23/2015ongoingMTYELLOWSTONEMallard, Northern Pintail, American Wigeon, Green-winged TealOpen< 75USGS NWHC
03/23/201503/24/2015PAFULTONWood FrogOpen< 25USGS NWHC
03/18/201504/15/2015MIDICKINSONNorthern Long-Eared Bat, Little Brown BatFungal Infection: white-nose syndrome suspect< 200MI State University
03/13/2015ongoingNMGRANTChiricahua Leopard FrogOpen< 25USGS NWHC
03/11/2015ongoingINLAKELesser ScaupOpen< 25USGS NWHC
03/10/2015ongoingOHLUCASCanvasback, Redhead Duck, Ring-billed Gull, Great Blue Heron, Unidentified ScaupOpen< 100USGS NWHC
03/10/2015ongoingNDOLIVERMallard, Canada GooseOpen< 25USGS NWHC
03/09/2015ongoingIDJEFFERSONLesser Snow Goose, Ross' Goose, Northern Pintail, American Coot, Trumpeter SwanAvian cholera suspect~ 2500ID Wildlife Health Lab, USGS NWHC
03/06/2015ongoingMOST CHARLESSnow Goose, MallardAvian cholera suspect< 25SCWDS
03/01/201503/30/2015IDCANYONSnow Goose, Greater White-fronted Goose, Ross' Goose, Mallard, Ring-necked DuckAvian cholera suspect< 350ID Wildlife Health Lab
03/01/201503/10/2015WADOUGLASSteller's JayOpen< 10USGS NWHC
02/25/201503/25/2015AZMOHAVEMourning DoveOpen< 50USGS NWHC
02/25/2015ongoingPAERIEMallard, Lesser Scaup, Red-breasted Merganser, Great Blue HeronOpen< 50USGS NWHC
02/25/2015ongoingCAMULTIPLE COUNTIESMourning DoveParasitism: trichomoniasis suspect~ 100- no diagnostics pursued -
02/23/201502/23/2015TXCAMERONHouse SparrowToxicosis suspect, Pulmonary congestion< 10USGS NWHC
02/19/201502/23/2015KYFAYETTEAmerican RobinEmaciation< 25SCWDS
02/18/2015ongoingTXLAMBLesser Scaup, Ruddy Duck, Northern Pintail, American Coot, MallardOpen< 50USGS NWHC
02/10/2015ongoingWIPIERCELittle Brown BatBronchopneumonia, Pulmonary congestion~ 2000USGS NWHC
02/07/201502/07/2015MTYELLOWSTONEMallardAspergillosis< 10USGS NWHC
02/05/201502/05/2015WAFRANKLINMallardUndetermined, Parasitism< 10USGS NWHC
02/04/2015ongoingCAMULTIPLE COUNTIESPine SiskinSalmonellosis~ 200CA Animal Health/Food Safety Lab
02/02/201502/02/2015GAHENRYRuddy Duck, Unidentified DuckTrauma: gunshot~ 10SCWDS
01/31/201504/15/2015MIONTONAGONNorthern Long-Eared Bat, Big Brown Bat, Eastern Pipistrelle (AKA Tri-colored), Little Brown BatOpen~ 500MI State University
01/31/201502/02/2015WIWAUKESHAMute SwanParasitism: Sphaeridiotrema sp., Enteritis: hemorrhagic< 10USGS NWHC
01/30/201501/30/2015UTCACHECanada GooseOpen< 10USGS NWHC
01/30/2015ongoingNCDARETundra SwanLead poisoning< 25USGS NWHC
01/27/2015ongoingFLOKALOOSAEastern Red-spotted Newt, Southern Leopard FrogOpen< 25USGS NWHC
01/22/201501/29/2015WABENTONCommon Goldeneye, Barrow's Goldeneye, BuffleheadOpen< 10USGS NWHC
01/20/201501/20/2015LAASCENSIONBlack VultureToxicosis: phorate< 50USGS NWHC, SCWDS
01/16/201501/17/2015CASANTA BARBARACanada GooseUndetermined< 25- no diagnostics pursued -
01/16/201501/30/2015CAALAMEDA, CONTRA COSTAUnidentified Shorebird, Common Goldeneye, Bufflehead, Surf Scoter, Horned GrebeAvian cholera~ 200USGS NWHC
01/15/201501/21/2015WIROCKHouse SparrowSalmonellosis suspect< 10- no diagnostics pursued -
01/15/2015ongoingCAMULTIPLE COUNTIESSnow Goose, Ross' Goose, Greater White-fronted Goose, Northern PintailAvian cholera< 850USGS NWHC
01/14/2015ongoingMOMULTIPLE COUNTIESSnow Goose, American Coot, Greater White-fronted Goose, Pied-billed Grebe, Ring-necked DuckAvian cholera, Trauma, Emaciation< 1000SCWDS
01/14/201502/09/2015AZLA PAZMallard, Burrowing Owl, Northern Pintail, American Wigeon, Canada GooseOpen< 50USGS NWHC
01/14/201501/20/2015OHCLINTONMallard, Canada Goose, Domestic Black DuckGout< 100USGS NWHC
01/14/201501/14/2015GAFULTONCedar WaxwingTrauma< 10SCWDS
01/13/201502/10/2015IAPOLKCanada GooseOpen~ 75USGS NWHC
01/13/2015ongoingCAALAMEDARuddy Duck, American Coot, Bufflehead, Unidentified Gull, Unidentified AvianAvian cholera< 150CA Fish & Game Disease Lab
01/08/201501/09/2015NESCOTTS BLUFFMallardAvian cholera, Trauma< 25USGS NWHC
01/08/201501/12/2015VASURRYEastern Brown PelicanOpen< 25USGS NWHC
01/06/2015ongoingCTHARTFORDAmerican CrowOpen< 25USGS NWHC
01/06/201501/10/2015ILALEXANDERLesser Snow GooseAvian cholera< 5USGS NWHC
01/06/201501/30/2015CAGLENNLesser Snow Goose, Ross' Goose, GadwallAvian cholera< 25USGS NWHC
01/05/201501/30/2015CACOLUSAAmerican Wigeon, American Coot, Northern Pintail, Ross' GooseAvian cholera< 200USGS NWHC
01/05/201501/25/2015CAHUMBOLDTAmerican Coot, American Wigeon, Ruddy Duck, Eared Grebe, Tundra SwanAvian cholera< 1300USGS NWHC
01/02/2015ongoingILFAYETTELesser Snow Goose, Mallard, Ross' GooseAvian cholera, Trauma: gunshot< 150USGS NWHC
01/02/201501/02/2015TXCAMERONHouse SparrowParasitism: Sarcocystis< 25TX Vet Med Diagnostic Lab
01/01/2015ongoingMSTALLAHATCHIELesser Snow Goose, Green-winged Teal, Northern Pintail, Mallard, Greater White-fronted GooseOpen< 75USGS NWHC
01/01/2015ongoingUTSALT LAKEEurasian Collared DoveTrauma, Viral Infection: pigeon paramyxovirus 1< 50USGS NWHC
01/01/201502/15/2015CAIMPERIALDouble-crested Cormorant, Unidentified Gull, Northern Shoveler, Lesser Snow Goose, Unidentified AvianAvian cholera< 500USGS NWHC
12/31/201401/01/2015ARWHITEMallard, Green-winged Teal, Northern PintailAsphyxiation, Pneumonia< 300USGS NWHC
12/29/201401/03/2015ILMASONLesser Snow Goose, Greater White-fronted GooseAvian cholera~ 50USGS NWHC
12/28/201404/15/2015MIKEWEENAWEastern Pipistrelle (AKA Tri-colored), Big Brown Bat, Northern Long-Eared Bat, Little Brown BatFungal Infection: white-nose syndrome suspect~ 500MI State University
12/28/201412/31/2014FLMONROETurkey VultureDrowning, Septicemia suspect< 75USGS NWHC
12/25/201401/07/2015TXOCHILTREEEurasian Collared DoveParasitism: trichomoniasis, Viral Infection: pigeon paramyxovirus 1 suspect, Predation< 75USGS NWHC
12/24/2014ongoingCAMULTIPLE COUNTIESVaried Thrush, American RobinTrauma: impact~ 1000CA Animal Health/Food Safety Lab, USGS NWHC
12/20/201401/23/2015ORMULTNOMAHMallard, American Wigeon, Northern PintailTrauma, Lead poisoning, Enteritis< 50USGS NWHC, OR State Diagnostic Lab
12/15/2014ongoingCAMULTIPLE COUNTIESBand-tailed PigeonParasitism: trichomoniasis~ 11000CA Fish & Game Disease Lab
12/05/201402/17/2015NVMINERALAmerican Coot, Mallard, American Wigeon, Gadwall, Ruddy DuckAvian cholera~ 3000USGS NWHC
12/01/201402/09/2015CAMERCED, STANISLAUSAmerican Coot, Snow Goose, Ross' Goose, Northern Shoveler, Aleutian Canada GooseAvian cholera< 1350USGS 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
11/26/201412/02/2014AZMARICOPAGreat-tailed Grackle, Western Screech OwlTrauma: impact, Toxicosis suspect< 25USGS NWHC
11/24/201401/15/2015AZMARICOPAMourning Dove, Unidentified GrackleToxicosis: strychnine< 25USGS NWHC
11/21/201401/30/2015CASUTTERSnow Goose, Unidentified Duck, Ross' Goose, Greater White-fronted Goose, American CootAvian cholera< 250USGS NWHC
11/17/201411/27/2014NCPITTCanada GooseLead poisoning~ 10SCWDS
11/15/201401/19/2015NMSOCORROWestern Grebe, Mallard, Northern Pintail, American Coot, Lesser Snow GooseAvian cholera, Lead poisoning~ 3850USGS NWHC
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, American Wigeon, Northern Pintail, Gadwall, Green-winged TealTrauma: impact~ 150USGS NWHC, SCWDS
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
10/21/201410/23/2014ALTUSCALOOSABrazilian Free-tailed BatTrauma< 25SCWDS
10/20/201410/20/2014MNMEEKERDouble-crested CormorantTrauma: impact, Salmonellosis< 10USGS NWHC
10/15/201410/15/2014OHMEDINAGreen FrogTrauma, Parasitism~ 200USGS NWHC
10/15/201411/22/2014WILA CROSSEAmerican Coot, Lesser ScaupParasitism: trematodiasis, Parasitism: Leyogonimus polyoon, Parasitism: Cyathocotyle bushiensis< 350USGS NWHC
10/12/201410/31/2014MDDORCHESTERDiamondback TerrapinUndetermined~ 200USGS NWHC
10/12/201410/12/2014HIHAWAIIHouse SparrowUndetermined< 25USGS 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
09/30/2014ongoingCAMULTIPLE COUNTIESHouse FinchParasitism: trichomoniasis, Mycoplasma~ 200CA Animal Health/Food Safety Lab
09/14/201410/14/2014AZYAVAPAIGambel's QuailEnteritis, Emaciation~ 10USGS NWHC
09/07/201411/25/2014TXHOCKLEYHouse Sparrow, Unidentified Hawk, Long-billed ThrasherToxicosis suspect, Trauma~ 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
08/14/201402/28/2015OR / WA / CAMULTIPLE COUNTIESCassin's Auklet, Common Murre, Rhinoceros Auklet, Brandt's Cormorant, Western GullEmaciation: starvation, Parasitism: intestinal, Avian pox suspect~ 3500CA Fish & Game Disease Lab, USGS NWHC, OR State Diagnostic Lab
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
06/01/201411/15/2014CALOS 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

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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