Homing is not a single superpower. It is a layered navigation system that changes with distance, weather, experience and landscape.
Research suggests pigeons combine an olfactory map with a sun compass, then switch to familiar visual landmarks near home. Low-frequency sound and magnetic cues may also contribute.
Young birds learn. Experienced birds develop preferred routes, sometimes following roads and rivers even when a straighter line is available.
Watch a pigeon for five minutes and the ordinary becomes specific.
Try this on your next walk
Choose one pigeon and follow its decisions without approaching. Note where it feeds, rests, watches and meets others. You are mapping a small life.