Ghostly Goldenfinch at top near bottom of feeder appear as white blurs while the two birds seen more clearly are partly ghosted. The one on the left appears to have the tail covered by the feeder and the right one has it head partly covered by the white feeder sock. Shutter priority and movement causes this effect when set accordingly; no flash was used but it has the same effect as having the flash set to flash near the end of shutter closing.