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I hadn't read the link in Tom's e-mail when I posted my reply.  

Sherry


--- Original Message ---
From: Sherry McCowan <[log in to unmask]>
To: [log in to unmask]
Subject: Re: Medical Ctr Peregrines and Forest Park Martins

>Although in the past few years Purple Martins near the nesting
>house have been flying and vocal at any time I was there.  This
>morning I decided to check earlier than I have been the past
>couple of weeks to see whether this year time of day might make a
>difference.
>
>This morning: 12 Purple Martins soaring over the area near the
>skating rink!  I don't know how early the Peregrines are up and
>about - could the swallows be adjusting their activities
>according to the timing of falcon hunting?
>
>Sherry
>  
>--- Original Message ---
>From: "Bailey, Tom" <[log in to unmask]>
>To: [log in to unmask]
>Subject: Medical Ctr Peregrines and Forest Park Martins
>
>>I was afraid of this, but I would regard my observation as
>speculative =
>>at
>>this point.  I hope that I am wrong. There are a number of possible
>>explanations for an apparent decline in the martin numbers given
>what =
>>lurks
>>in Forest Park (see link below).  One must admit, however, that
>the =
>>current
>>location of the martin house is convenient for the medical center =
>>peregrines'
>>hunting. A better location might be very near the Boathouse
>Restaurant.  =
>>In
>>its current location, I don't believe that the suggestion in the
>link =
>>below
>>for maintaining a human presence during peak hunting hours would be
>>particularly practical for a number a reasons, not the least of
>which =
>>would
>>be identifying any daylight hour as anything other than peak
>with three
>>peregrine chicks to feed, nor would it likely be effective
given the
>>habituation of these peregrines to humans, in which case even the =
>>Boathouse
>>Restaurant location would be vulnerable.
>>=20
>>More knowledgeable people than I may wish to weigh in.
>>=20
>>Tom
>>=20
>>http://purplemartin.org/forumarchives/predator.htm
>>=20
>>****************************************************************
>>Subject: Re: Medical Ctr Peregrines
>>From: Sherry McCowan <mccowan AT SWBELL.NET>
>>Date: Thu, 24 May 2007 07:53:56 -0500
>>
>>Oh dear. I have noticed a BIG decrease in numbers of Purple
>Martins!  =20
>>The past few days I've seen maybe 3 or 4 near the skating rink, =20
>>whereas a couple of weeks ago there were at least a dozen. 
I've =20
>>wondered what happened to them, but didn't make the connection.
> A =20
>>couple of days ago I saw an adult male perched in one of the =20
>>evergreens just before the bridge - he looked as though he were =20
>>taking shelter, but I couldn't see what he seemed to be hiding
from.
>>
>>This is disappointing, and sadly ironic.  Two very cool species,
>both =20
>>of which are encouraged to nest, and the one apparently falling
>prey =20
>>to the other.
>>
>>**********************
>>Sherry McCowan
>>Saint Louis, Missouri
>
>*****************************
>Sherry McCowan
>Saint Louis, Missouri
>
*****************************
Sherry McCowan
Saint Louis, Missouri

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