Not a single word of your statement is true.
I worked at a freakin’ grocery store for some time. Crows and pigeons do NOT fly away simply from noise and or movement. You have to be on top of them for them to get the hint. I don’t need a book to tell me that. I’ve seen it.
Any time you can see fit to leave the "grocery store", come on down, I'll show you some things about hawks.
http://www.pbase.com/tsiya/root
http://photobucket.com/albums/v244/tsiya/
http://cabbagehammock.blogspot.com/