the.com/homing pigeon

means A pigeon trained and bred to find its way home over long distances, historically used to carry messages.

from From 'home' plus 'pigeon' (which traces back to Latin 'pipio,' a young chirping bird, via Old French). Pigeons' homing instinct — tied to their uncanny sense of magnetic fields, sun position, and smell — was exploited by humans for centuries; armies and newsrooms used trained birds as living mail long before electronic signals made the job obsolete.