ML643630978

觀察細節

Flying and circling low overhead around 9 am. One large group broke off the headed to the ESE in more or less a straight line. In the meantime, more flew in from the west and joined a group of 20 or so that were still circling low overhead. This group then also flew off in a straight line headed ESE. At about 9:15 am another group of 17 was seen circling overhead. A few minutes later, this group also flew off.