[obol] Another Tennessee Warbler ... in Benton County

[DAVID IRONS]

Alan offers some good commentary on the differences between the green on a 
Tennessee Warbler, as opposed to the green of an Orange-crowned Warbler.  
One of the structural characteristics Doug mentions is not often covered 
well.  Doug refers to the "short-necked, short-tailed" shape of his bird and 
he goes on to do a nice job of describing the extension of the undertail 
coverts.  Tennessee do have very long undertail coverts which create a very 
short-tailed look.  Orange-crowned Warblers have a proportionally longer 
looking tail.  It is not often shown in field guides, but Orange-crowned 
Warblers (particularly immatures of the gray-headed forms) can and often do 
show a fair amount of white on the lower belly between the legs.  However, 
unlike Tennessee Warblers, the white is restricted to the lower belly and 
they do not ever show white undertail coverts.

Dave Irons
Eugene, OR


>From: Alan Contreras <acontrer at MINDSPRING.COM>
>To: Joel Geier <jgeier at attglobal.net>,obol <obol at lists.oregonstate.edu>
>Subject: Re: [obol] Another Tennessee Warbler ... in Benton County
>Date: Thu, 21 Sep 2006 16:48:52 -0700
>
>At Malheur we were seeing every conceivable form of Orange-crown, but the
>proportion of gray-headed birds was pretty high.
>
>The Tennessee could blend in pretty well with the Orange-crowns in shaded
>spots, but when it came out in the sun, it was a different shade of green -
>grass green instead of moss green? - and the breast was a purer yellow
>trailing down the flanks a bit, with white under the tail and up between 
>the
>legs.  The face had more of an eyeline and less of that Orange-crowny
>eye-crescent look.  But a very subtle set of differences.
>
>--
>Alan Contreras
>EUGENE, OREGON
>acontrer at mindspring.com
>
>
> > From: Joel Geier <jgeier at attglobal.net>
> > Reply-To: <jgeier at attglobal.net>
> > Date: Thu, 21 Sep 2006 14:55:38 -0700
> > To: Oregon Birders OnLine <obol at lists.oregonstate.edu>
> > Subject: [obol] Another Tennessee Warbler ... in Benton County
> >
> > Hello folks,
> >
> > Doug Robinson reported a TENNESSEE WARBLER at the Vanderpool Tract
> > (Willamette River) greenway in NE Benton County this morning. Joe
> > Fontaine was able to see the bird later on (around noon).
> >
> > This makes at least four Tennessee Warblers in the state this week,
> > including the one Bill Tice found at Suttle Lake (Jefferson Co.) and the
> > one along Antone Rd. (Wheeler Co.) over the weekend, plus at least one
> > at Malheur NWR (Harney Co.) reported by Daniel Farrar et al. Seems to me
> > there was one reported somewhere else -- around PDX? It might be worth
> > checking all those "Orange-crowned" Warblers closely.
> >
> > It's also interesting that unusually high numbers of migrant OCWAs were
> > seen over the weekend in east/central Oregon. I was seeing a fairly high
> > proportion of "gray-headed" OCWAs in Wheeler Co. Was that the pattern
> > elsewhere these flocks were encountered?
> >
> > Good birding,
> > Joel
> >
> > --
> > Joel Geier
> > jgeier at attglobal.net
> >
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