Scientists have discovered that homing pigeons may navigate using super-paramagnetic immune cells located in their livers [1].
This finding provides a potential biological explanation for one of nature's most enduring mysteries: how birds travel vast distances to find their way home. While researchers have long suspected that birds detect the Earth's magnetic field, the specific biological mechanism has remained elusive.
The study, published online May 26, 2026, in the journal *Science*, identifies specific iron-rich immune cells known as macrophages that act as magnetic sensors [1]. These cells are located within the liver, suggesting that the birds' navigation system is tied to an internal organ rather than just the eyes or beak [2].
Researchers said this process is a literal "gut feeling" for direction [3]. The super-paramagnetic nature of these macrophages allows them to respond to the subtle shifts in the Earth's magnetic field, providing the birds with a biological compass [1].
By analyzing the liver tissue, the research team found that these cells could sense magnetic orientation [2]. This discovery shifts the focus of avian navigation research toward the liver, adding a new layer to the existing theories regarding magnetoreception in animals [1].
The study suggests that the liver-based sensors work in tandem with other sensory inputs to ensure precise homing [2]. This multifaceted approach allows pigeons to maintain accuracy even when other environmental cues, such as landmarks or smells, are unavailable [3].
“Homing pigeons may navigate using super-paramagnetic immune cells in their liver.”
This research challenges the traditional view that avian magnetoreception is limited to the head or eyes. By identifying the liver as a site for magnetic sensing, scientists are expanding the understanding of how complex biological systems integrate sensory data from multiple organs to achieve precise long-distance navigation.
