RE: [CALBIRDS] Re: [CVBirds] Cosumnes birds- 05 VIII 05
- Corivds appear to be most susceptible to West Nile (see the article by
Komar N, Experimental infection of North American birds with the New York
1999 strain of West Nile virus. Emerg Inf Dis 2003; 9:311). I believe all
the black-billed magpies in his study that got West Nile died but his sample
was also very small.
Some species appear not to become symptomatic after exposure.
From: CALBIRDS@yahoogroups.com [mailto:CALBIRDS@yahoogroups.com] On Behalf
Of Will Chatfield-Taylor
Sent: Monday, August 08, 2005 8:44 PM
Subject: [CALBIRDS] Re: [CVBirds] Cosumnes birds- 05 VIII 05
Could be sampling error, as Magpies as exceptionally large and obvious, the
other birds might just go unnoticed.
On Aug 8, 2005, at 6:58 PM, John Sterling wrote:
> A colleague of mine told me that his daughter found up many dead
> magpies near her school a few weeks ago...this is along the American
> River in the Sacramento area.....
> John Sterling
> 26 Palm Ave
> Woodland, CA 95695
> 530-668-1985 (home)
> 530-908-3836 (cell)
> ----- Original Message -----
> From: "Andrew Engilis" <aengilisjr@...>
> To: "John and Glennah Trochet" <trochetj@...>; "Central Valley
> Sent: Monday, August 08, 2005 10:23 AM
> Subject: Re: [CVBirds] Cosumnes birds- 05 VIII 05
> > John -- I returned from the WNV diagnostics lab here at UCD and the
> number > of YB Magpies turning up is alarming. They account for
> about 1/3rd of all > birds examined, maybe more. Of the last run
> they look at they examined > about 300 birds total (about 100 were
> YBMA). What is so alarming here is > that these are only the birds
> people are finding. I have not looked at > the > geographic nature
> of these data, but after this season is over it might be > beneficial
> to pull together a note for CV Bulletin. I only hope the > species
> can withstand this until populations can build immunities (as > other
> > corvids have done in other regions of NA). Another troublesome note
> is > that according to researchers two tests are used to look at
> positive > response to WNV and only one is picking up the virus.
> This may mean that > the virus has mutated or there is another strain
> that is impacting Western > Birds. I'll pass along more when I learn
> > Andy
> > At 05:20 PM 8/5/2005, you wrote:
> >>Dear Birders,
> >>A handful of observers returned early this morning to Orr Ranch at
> the >>Cosumnes River Preserve. Thanks to Terry Ronneberg's playing a
> recording >>of the song, the prothonotary warbler was lured into
> view. We did not >>refind the black-throated sparrow or sanderling.
> >>Once again we failed to see or hear yellow-billed magpie.
> Historically, >>Orr Ranch is one of the best places on the preserve
> for detecting this >>species. I understand from a well-placed source
> in the county health >>department that magpies have been especially
> hard hit by West Nile virus >>in Sacramento County.
> >>John Trochet
> >>[Non-text portions of this message have been removed] >> >> >>
> >> >>Yahoo! Groups Links >> >> >> >> > >
> > Andrew Engilis, Jr.
> > Museum Curator
> > Museum of Wildlife and Fish Biology > Department of Wildlife,
> Fish, and Conservation Biology > One Shields Avenue > University of
> California, Davis > Davis, CA 95616 > > Phone: (530) 752-0364 >
> Fax: (530) 752-0364 > E-mail: aengilisjr@... > > > > >
> > Yahoo! Groups Links > > > > > > >
> YAHOO! GROUPS LINKS
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San Ramon, CA
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