Re: [Phys-L] Why are birds similar to airplanes? and Re: [PHYSHARE] Why do birds congregate on the utility wires near the poles?

[Bennett <bennett@oakland.edu>]

Today I observed all the birds on a single wire were crowded exactly above
the street and sidewalks,  and none beyond.

Is there any conceivable cause?

On Sat, Nov 3, 2012 at 9:25 PM, Bernard Cleyet
<bernardcleyet@redshift.com>wrote:

> On 2012, Nov 03, , at 15:30, Alexander Ruper wrote:
>
> > > But they are very equally spaced and facing the same direction in
> general
> > > (probably due to the wind).  But why the very regular spacing, even when
> > > one is missing? Then the space is about doubled.  You big guys wade  in.
> > > I'll
> > > watch and keep my ignorance under wraps for a while.
> > >
> > > Larry Brown
>
> Read at end, tho not necessarily authoritative.
>
> > > In a message dated 11/3/2012 2:18:29 P.M. Central Daylight Time,
> > > geepaw@WOWWAY.COM writes:
> > >
> > > Greetings.
> > > There is less sway in the line the closer one is to  the pole.
> > >
> > > My 2 cents worth
> > >
> > > Dic
>
>
> Gate Keeper's reason.
>
>
> The physics of wires and wind:
>
> http://en.wikipedia.org/wiki/Stockbridge_damper
>
>
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>
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>
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>
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>
>
> bc
>
> http://www.squidoo.com/why-birds-like-to-sit-on-power-lines
>
> Birds that sit on power lines almost always face the direction of oncoming
> wind. Birds have an easier time taking off and landing facing the wind.
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-- 
Clarence Bennett
Oakland University
Dept. of Physics,  (retired)
111 Hannah
Auburn Hills MI 48309
248 370 3418