. Makes me think that the BG are looking of suitable areas to bed.Dean
Many studies have shown that BG and other species look for the
best spawning area. They take lots of things into account - silting, nest material, wind and wave action, water flow, predation, cover/plant and other material, sunlight and depth, etc.
If the BG moved beds to a newel raked area, then they were moving away from a less advantageous area to a better spot.