🐦 Starling Flock: Seven-Neighbour Rule vs Fixed Radius, Density Change and Falcon Turn-Wave — 2D Flock Top View and Order Statistics

2D companion of the starling flocking lab: top and side views of the flock with the chosen bird's neighbours, order parameter, group count, nearest-neighbour distance histograms and falcon-attack response, using the same topological versus metric flocking model as the 3D page.