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Re: Fall migration?



I was struck by all the references to migration.  Amateur that I am, I
always assumed migrations started when the weather got just a little cooler.
But July???  What factors drive the timing or the actual start date of
migrations?

Paula Mangiafico
Southern Durham Co.


----- Original Message -----
From: "L & J LENTZ" <LJL@ETINTERNET.NET>
To: <carolinabirds@duke.edu>
Sent: Monday, July 23, 2001 3:09 PM
Subject: Fall migration?


>
> Sunday and today I've had an invasion of black and white warblers.  Don't
> know the size of the flock, but it seems they were everywhere. I really
> enjoyed seeing so many in the big trees in my back yard. Has the fall
> migration begun already?
>
> Has anyone else noted the decline of black-and-yellow Argiope, sometimes
> called "writing spider".  I have not located a single one in my yard this
> year.
>
> Lucille Lentz
> Richmond County, NC
> ljl@etinternet
>
>
>