During my run I saw lots of geese preparing for the night

During my run I passed a big field that had at least 100 Canadian Geese in it. The area occupied by the geese was about an acre, and they were everywhere in that area. It was late afternoon, about 2 hours before dark. I passed the field going out and again coming back, and the geese were there both times, although some of them did move to another area in the field. I've noticed this in the past. The geese seem to like open fields, even big lawns.