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US - Idaho: suspected avian cholera outbreak claims 2,000 migrating snow geese - Lab results inconclusive for avian cholera, some of the tested bird

Pathfinder

Editor, Senior Moderator
Thousands of snow geese fall dead from sky in Idaho

BY LAURA ZUCKERMAN
SALMON, Idaho Mon Mar 16, 2015 11:14pm EDT

(Reuters) - Avian cholera is suspected in the deaths of at least 2,000 snow geese that fell dead from the sky in Idaho while migrating to nesting grounds on the northern coast of Alaska, wildlife managers said Monday.

Dozens of Idaho Department of Fish and Game workers and volunteers at the weekend retrieved and incinerated carcasses of snow geese found near bodies of water and a wildlife management area in the eastern part of the state, said agency spokesman Gregg Losinski.

Avian cholera is believed to be the culprit in the deaths mostly because of the way the birds died, he said.

?Basically, they just fell out of the sky,? said Losinski.
...

http://www.reuters.com/article/2015/03/17/us-usa-idaho-dead-geese-idUSKBN0MD09620150317

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IDAHO FISH AND GAME
Upper Snake NEWS RELEASE
Idaho Falls, ID
Date: March 16, 2015

Contact: Gregg Losinski
gregg.losinski@idfg.idaho.gov
(208) 525-7290

Suspected Avian Cholera Outbreak Claims 2,000 Migrating Snow Geese

MUD LAKE - The Idaho Department of Fish & Game (IDFG) is reporting that during the past weekend staff and volunteers collected the carcasses of approximately 2,000 migrating snow geese that appeared to have succumbed to avian cholera and died while stopping at Mud Lake and Market Lake Wildlife Management Areas (WMAs), on their way back north to their nesting grounds in Northern Alaska. The carcasses were collected and will be incinerated so that other predatory and scavenger birds do not ingest the deadly bacteria. Results are not yet back from the IDFG Wildlife Laboratory to definitively confirm avian cholera, but apparent symptoms seem to indicate the disease. According to the United States Geographical Survey Health Laboratory, humans are not at a high risk of infection from the bacteria causing avian cholera.

The carcasses of a small number of snow geese were first reported at Camas National Wildlife Refuge near Dubois, Idaho. Closer inspection on Friday found higher numbers of dead birds at the Mud Lake WMA Area near Terreton, Idaho and a lesser amount at Market Lake WMA near Roberts, Idaho. The migratory birds were on the return leg of their migration from the southwestern United States and Mexico to their breeding grounds on the northern coast of Alaska. It is unknown at this time where the geese may have picked up the suspected bacteria. "Outbreaks of avian cholera have occurred sporadically in the region over the past few decades," said Upper Snake Regional Supervisor Steve Schmidt.

According to Schmidt, "The important thing is to quickly collect as many of the carcasses as possible, to prevent other birds from feeding on the infected birds." In the case of Mud Lake WMA, biologists observed about twenty eagles in the vicinity of some of the carcasses. Because of a delayed incubation period it is uncertain where these eagles might be located, if and when the avian cholera affects them.

If the public observes dead birds, they are asked to call and report the location to the Upper Snake Regional Office at 208-525-7290. While there is little possibility of humans contracting the disease, the public is asked to not handle dead birds because of the potential for unintentionally distributing the disease to other wildlife.

http://fishandgame.idaho.gov/public/media/viewNewsRelease.cfm?newsID=7561
 
IDAHO FISH AND GAME
Headquarters NEWS RELEASE
Boise, ID
Date: May 15, 2015


Contact: Mike Demick
mike.demick@idfg.idaho.gov
(208) 334-3746


Test Results Released On Eastern Idaho Snow Goose Die Off

In mid-March, approximately 2,200 migrating lesser snow geese were found dead at the Mud Lake and Market Lake Wildlife Management Areas while on their way north to their nesting grounds in western arctic.

Biologists suspected avian cholera because outbreaks of avian cholera are common among snow geese during spring migrations. At least one bird examined in the field showed symptoms consistent with cholera. 24 birds were randomly selected and sent to the Idaho Fish and Game Wildlife Health Lab for further testing. The rest were incinerated to prevent ingestion by scavengers.

Lab results were inconclusive for avian cholera but indicated some of the tested birds died from zinc phosphide poisoning. Zinc phosphide is a compound used in rodenticides to control voles and other rodents that damage crops. Avian cholera may have played a part in the die off but to what extent is unknown.

Idaho Fish and Game has provided the lab results to the Idaho Department of Agriculture. It is important to stress that while unfortunate, the die off will not affect overall snow goose populations, which number in the millions.

http://fishandgame.idaho.gov/public/media/viewNewsRelease.cfm?newsID=7652
 
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