Participant Photo: Evening Fly By

For the last week or so we have noticed groups of crows flying by at about the same time each evening. Usually there are five to 15 in each group. The whole process takes about 10 minutes and probably the final count of crows is 75 to 100. Of course the evening I finally had my camera handy, there seemed to be a diminished amount of crows. Maybe they are changing course?