How pigeons exploit magnetic fields for navigation

Pigeons possess iron-rich macrophages in their livers that act as magnetic sensors, enabling detection of Earth's magnetic field for navigation. Removal of these cells disrupts magnetic-based homing, especially under overcast conditions. This discovery reveals an unexpected mechanism for avian magnetoreception that operates independently of previously theorized eye proteins or beak minerals.

Source: Ars Technica | 2026-05-28