It looks like birds taking off - or at least their "footprints" on the water's surface. The picture below is of some American Coots taking off. There are Eurasian Coots in Germany. They have to "run" a long way to get airborne.



Credit: www.andytheflyguy.ca

G'day Hill. Here i think you will find eight waterbirds landing on Allmanssdorf, Germany. Precision landing at its best.

Formation flying near Dunkirk, France.


There are a lot of flock's of bird's getting in for a free feed by following tractor's seeding their field's around this area.