I have my own theory about crows and have had my thoughts proven twice in my own life. It haunts me a little for the fact that when I moved into my new place, the backyard is full of cackling crows all morning.
When I go to the Senior Center and go outside to smoke, the past 2 days, the crows are thick and louder than ever. I hope they are not a sign for me. I am not ready for anymore sad news.
Here is one I was lucky enough to have sit still long enough to capture.
Who I am 
I always loved the black crows…but, to see them in abundance kinda reminds me of the movie “The Birds” “… Alfred Hitchcock” I think…
http://www.rottentomatoes.com/m/1002448-birds/
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When my daddy died, the tree branches turned black from so many crows, just like the movie you speak of here, but within a couple of minutes they all few away. I knew without a doubt the birds new my daddy had just died
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