This simulation visualizes the flight of migrating butterflies, modeled loosely on the annual journey of Monarch butterflies, which travel up to 4,800 km (3,000 mi) from Canada and the northern US to overwintering sites in central Mexico. Real monarchs navigate using a time-compensated sun compass, likely aided by a magnetic sense, and cruise at roughly 8-19 km/h, often riding thermals up to 1,200 m in altitude to conserve energy. Remarkably, the round trip spans multiple generations — no single butterfly alive today completes the entire migration cycle. Here, a flock wanders over a low-poly meadow with wind, speed, and flock size all under your control.