The feather is approx 3 inches long.
No interactions present.
Definitely a Grt Spotted Woodpecker. I have regular visits to my bird feeder and have a collection of feathers exactly the same as pictured.
Lat/Lng: 55.23, 14.79
I found it on the ground in a 'mixed' wood (spruce, ash, hazel, wild cherry) but never saw or heard the bird