[CT Birds] Paul D's "Interesting Experience"

Dennis Varza dennisvz at optonline.net
Thu Mar 15 11:48:00 EDT 2012


Hi Folks

Many Many Moons Ago

I read a paper on sparrows. I think it was Field Sparrows and Song  
Sparrows. The point I remember is that when a bird only had  
conspecifics as neighbors it ignored the other species, when it had  
the other species as a neighbor it responded to them.


Dennis Varza
Fairfield

On Mar 15, 2012, at 9:57 AM, Kevin Burgio wrote:

> All,
>
> This is not a purely scientific thought, however, I think that  
> while a bird
> is already defending territory, it may be in the birds interest to  
> react to
> any perceived threat, no matter how unlikely.
>
> I think of it like how we (humans) evolved.  If we are in the woods  
> and
> hear something rustle in a bush, our sympathetic nervous system  
> kicks in
> and we become more alert and ready to run (or fight) because, even  
> if the
> noise is just the wind nine times out of ten, the one time it *is* a
> mountain lion we had better be prepared for it.
>
> There are costs associated to reacting to intruders, such as increased
> exposure to predators, metabolic (and perhaps injury) costs  
> associated with
> attacking another bird, however, if a bird wasn't aggressive when  
> defending
> its territory, their territory may shrink and a female may not  
> breed with
> them, culminating in their passive genes not being passed on.
>
> Just a thought without any real scientific study to back it up.
>
> Kevin
> ___________________________________
> Kevin Burgio
> Ph.D. Student
> NSF Graduate Research Fellow
> University of Connecticut
> Ecology and Evolutionary Biology Dept
> U-3043 75 No. Eagleville Road
> Storrs, CT  06269-3043
> kevin.burgio at uconn.edu
> (860) 486-3839
> http://www.eeb.uconn.edu/people/burgio
>
>
> On Thu, Mar 15, 2012 at 9:41 AM, <jaybrd49 at aol.com> wrote:
>
>>
>>  Not to mention that many of these birds have alternate and multiple
>> songs. So much to learn, so little time.....
>>
>> Jay Kaplan
>> Canton
>>
>>
>>
>>
>>
>> -----Original Message-----
>> From: Glenn Williams <gswilliams9 at yahoo.com>
>> To: ctbirds <ctbirds at lists.ctbirding.org>
>> Sent: Thu, Mar 15, 2012 7:39 am
>> Subject: Re: [CT Birds] Paul D's "Interesting Experience"
>>
>>
>>
>> It is probably also possible that the acoustics of the playback  
>> device do
>> not
>> represent the actual song as realistically as a live bird and  
>> could add to
>> the
>> confusion for a different species.
>>
>> Glenn Williams
>> Mystic
>> _______________________________________________
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>>
>> _______________________________________________
>> This list is provided by the Connecticut Ornithological  
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>> for the discussion of birds and birding in Connecticut.
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> _______________________________________________
> This list is provided by the Connecticut Ornithological Association  
> (COA) for the discussion of birds and birding in Connecticut.
> For subscription information visit http://lists.ctbirding.org/ 
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