Sooo many birds!!!

I have no idea what this is all about, what kind of birds they are, or why there were so many of them, but.....holy crap!

I have never seen so many birds flying together like that...and this isnt even all of them!! They got kinda low and there were so many of them that they surrounded me (which probably would have been cool for anyone else, but kind of freaked me out haha)...and thats when i screamed like a school girl and got back in the truck ;)