[TN-Bird] Re: Trumpeter Swan Sighting - Cox's Lake, July 29.
- From: kde@xxxxxxxxxxxxxxxxxx
- To: Bob Hatcher <hatcher2@xxxxxxxxxxxxx>
- Date: Wed, 1 Aug 2012 12:04:19 -0400 (EDT)
Bob,
In 2009, while I was chair of the TBRC, we reviewed and accepted a record
of Trumpeter Swans from Dyer Co. In that case, the bird was banded and
tracked back to be a wild-born bird from an "established" population in
Wisconsin... where "established" is as determined by the Wisconsin BRC.
However, that acceptance is for that individual record alone and is not a
blanket statement on all Trumpeter Swan reports in TN.
For example, there have also been reports from TN of banded Trumpeter's
that were tracked back to an ("re")introduced population from Ontario
where (at least at the time) they were not considered "established".
So personally, given that birds from "established" and "non-establihsed"
populations appear to be visiting TN, I would say that unless you can
clearly determine the origin of the bird and show that it is a wild-born
individual from an "established" population, it would not be strictly
"countable".
In that way, it is much like the status of Mute Swan. Hopefully these
("re")introduced populations of Trumpeter Swans won't become as big of a
nuisance species as the Mute Swans... though I think it may be heading
that way.
Of course there's the usual caveat that "countablility" is a nebulous
subject and the above statement is just my personal opinion. You can
"count" whatever you like on your own list and only need to concern
yourself with ABA rules if you report your totals to ABA... which I don't,
so someone else may wish to correct me.
Dean Edwards
Knoxville, TN
On Tue, 31 Jul 2012, Bob Hatcher wrote:
> I checked on the Trumpeter Swans at Cox's Lake of Williamson County, TN on
> Sunday, July 29 just north of the west-bound I-840, and just east of the
> Harpeth River. One trumpeter was visible on the lake at 1:15 p.m. One
> trumpeter was also observed at 3:30 p.m. in the adjacent grassy area about
> 200 feet north I-840. I walked along the shoulder of I-840 but never found
> the second trumpeter, but it could have easily been hidden by trees that
> border part of the lake adjacent to the interstate.
>
> According to Chris Sloan's TN-Birds report of July 1, 2012, they had been
> seen at a pond two miles to the west of Cox's Lake a "week or so" before
> July 1. Unless I missed a later report(s), they were last reported on
> TN-Birds by Mac and Susan McWhirter as present on Cox's Lake on July 12.
> Both sites are within the College Grove postal service. Has anyone seen
> both trumpeters lately, either at Cox's Lake or elsewhere?
>
> After its reintroduction in the Great Lakes states in the 1980's, at least
> the Michigan Bird Records Committee declared 11 years ago that any
> trumpeters seen in the wild in Michigan would be fully countable, as per
> their following email of August 21, 2001. Does the TOS Records Committee
> rate yet consider these swan sightings as countable in Tennessee, or is
> there too much uncertainty about their being escapees?
>
> Bob Hatcher
> Brentwood, TN 37027
>
>
> ---------- Forwarded message ----------
> Date: Tue, 21 Aug 2001 14:24:45 -0400
> From: Adam Byrne <byrnea@xxxxxxxxxxxxx>
> To: mich-listers@xxxxxxxxxxxxxx, mich-chat@xxxxxxxxxxxxxx
> Subject: Trumpeter Swan status in Michigan
>
> Greetings,
>
> The Michigan Bird Records Committee (MBRC) has been discussing the
> status of Trumpeter Swans in Michigan over the past year. The MBRC
> considered the four criteria defined by the ABA Checklist for established
> populations, and this past weekend voted to accept the introduced birds as
> established (and thus countable). It should be noted that the vote was not
> unanimous, but a majority of the MBRC did feel that "established" status is
> supported by the available data.
> Because the Trumpeter Swan introduction program has met its goals,
> there will no longer be any official censuring of Trumpeter Swans in
> Michigan; therefore we encourage observers to keep track of Trumpeter Swan
> sightings and submit them to the appropriate seasonal survey compiler.
> To reiterate, all observations of Trumpeter Swans in Michigan are
> now fully countable. (However, older observations - those prior to Aug 18,
> 2001 - are not countable, according to the technicalities of ABA standards.)
>
>
> Good birding,
>
> Adam M. Byrne
> Chairman, MBRC
>
>
>
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