J.S. Bach - Fugue in E minor, BWV 548, "Birds in the Wedge"

While doing the video for BWV 548 (a Fugue nicknamed "The Wedge" because of the characteristic figure of the subject), I realised that there is another figure that is used throughout the fugue, and although it is technically part of the contersubject, it is used everywhere, extensively so. Geometrically, the figure looks a little like a bird, that appears in one voice, then another, sometimes chained with the next, sometime by itself. So I decided to make a video of it, just to highlight it, because otherwise, unless you know this fugue intimately, it is lost, as it was lost on me :)