While sitting in my hard car, I happen to look up at the roof of the local hardware store and saw these pigeons all facing the same direction. Every few minutes the ones in front would fly away and the others would move forward. It was like watching tiny airplanes take off . I not a bird person so I don't know if this is normal behavior, but I found it quite interesting. Taken with my point and shoot.
Book: Read page 44 "Know your Craft"
Images: Viewed images in Digital Photo Pro magazine. This magazine has some really good articles.