[texbirds] Re: Fwd: Re: Gray-crowned Yellowthroat on Saturday
- From: Keith Arnold <kbarnold2@xxxxxxxxx>
- To: Brush Freeman <brushfreeman@xxxxxxxxx>
- Date: Sun, 15 Mar 2015 19:55:14 -0500
Brush,
I voted in favor of that record for two reasons: 1) the photos I saw
matched our series of GCYE specimens very closely. i.e., I could not
detect any noticeable differences; and 2) I found numerous instances in the
literature of warblers singing the songs of other species. I remain
convinced that the record is valid.
Keiith
On Sun, Mar 15, 2015 at 5:49 PM, Brush Freeman <brushfreeman@xxxxxxxxx>
wrote:
> **********************************************************************
> Brush Freeman
> 503-551-5150 Cell
> 120 N. Red Bud Trail. Elgin, Tx. 78621
> http://texasnaturenotes.blogspot.com/
> Finca Alacranes., Utley,Texas
> ---------- Forwarded message ----------
> From: Brush Freeman <brushfreeman@xxxxxxxxx>
> Date: Sun, Mar 15, 2015 at 5:48 PM
> Subject: Re: [texbirds] Re: Gray-crowned Yellowthroat on Saturday
> To: John Arvin <jarvin@xxxxxxxx>
>
>
> Good stuff...So what do you make of the San Ignacio bird of c1995-96 with
> the odd call? As I recall it did not make it thru the the TBRC even though
> it looked morphologically correct, though the call/song was distinctly
> "off".
>
> **********************************************************************
> Brush Freeman
> 503-551-5150 Cell
> 120 N. Red Bud Trail. Elgin, Tx. 78621
> http://texasnaturenotes.blogspot.com/
> Finca Alacranes., Utley,Texas
>
> On Sun, Mar 15, 2015 at 5:06 PM, John Arvin <jarvin@xxxxxxxx> wrote:
>
> > The Common Yellowthroat-like song that so far as I know *all* the modern
> > Gray-crowned Yellowthroats in South Texas have sung is a vast mystery to
> > me. I have recordings of several of these birds, including the individual
> > that nested with a female Common Yellowthroat at Sabal Palm Sanctuary
> back
> > in the early 2000s. I am relieved at least that the present bird is
> capable
> > of the Blue Grosbeak-like song that *all* of the Middle American
> > individuals (probably at least 100) I have ever heard have sung to the
> > exclusion of any suggestion of Common Yelllowthroat-like notes. All
> recent
> > Texas GCYTs have been males (females in this species being only slightly
> > differentiated by plumage unlike the rather striking differences in
> plumage
> > in the sexes of Common Yellowthroats). Assuming that all modern Texas
> GCYT
> > have been *pure* genetically then I suppose we must also assume that
> these
> > birds have learned the song from singing COYT. Since oscines (songbirds)
> > are known to learn their song repertoires this seems at least
> theoretically
> > possible. What is more troublesome is that some of the modern GCYT have
> > also called like COYT. The calls of oscines are thought to be inherited,
> > not learned like the songs. Two or three of the GCYT-appearing birds
> that I
> > have seen and recorded have neither called like GCYT nor responded to
> > playback of GCYT calls that I had recorded from birds in southern
> > Tamaulipas. I have not seen the present bird at Estero Llano Grande but I
> > have listened to calls on zeno-canto said to be similar to calls of that
> > bird and these sounded like normal GCYT calls. So in a sense the current
> > bird seems intermediate in its vocalizations. Gray-crowned Yellowthroat
> > seems to be unique among "Mexican vagrants" in apparently shifting its
> > vocal repertoire to be more like COYT in the absence of females of its
> own
> > species.
> >
> > John C. Arvin
> > Research Associate
> > Gulf Coast Bird Observatory
> > 103 West Hwy 332
> > Lake Jackson, TX 77566
> > jarvin@xxxxxxxx
> > www.gcbo.org
> > Austin, Texas
> >
> >
> > ----------------------------------------
> > From: "Mary Beth Stowe" <mbstowe@xxxxxxxxxxxxxxxxxx>
> > Sent: Sunday, March 15, 2015 11:08 AM
> > To: "texbirds" <texbirds@xxxxxxxxxxxxx>
> > Subject: [texbirds] Gray-crowned Yellowthroat on Saturday
> > Hi, all!
> >
> > The GCYE is now singing - both its classic bunting-like song and a very
> > Common Yellowthroat-like song, in the same general area it's been seen
> for
> > the last several months at Estero Llano Grande. Parts of the trail are
> > flooded but if you don't mind getting your feet wet, footing is a lot
> more
> > solid just heading straight through the water than trying to negotiate
> the
> > mud on either side! Tropical Parula was still being seen (also singing)
> > behind the headquarters.
> >
> > Blow-by-blow of the day (including a jaunt to Santa Ana) with pictures is
> > here:
> >
> >
> >
> http://miriameaglemon.com/photo_gallery/2015%20Field%20Trips/March/Estero%20
> >
> > Llano%20
> > <
> >
> http://miriameaglemon.com/photo_gallery/2015%20Field%20Trips/March/Estero%2
> >
> > 0Llano%20&%20Santa%20Ana.html> &%20Santa%20Ana.html
> >
> > .or here:
> >
> > http://tinyurl.com/n5rwjyb
> >
> > Enjoy! MB
> >
> > Mary Beth Stowe
> >
> > McAllen, TX
> >
> > miriameaglemon.com
> >
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