Scientists discover birds basically just loud smelly magnets
Ann Kennedy
Proposed structures/ mechanisms for magnetic sensing in bird (so far):
1) In the beak/ trigeminal Nerve (biogenic magnetite)
2) radical pair-Cryptochrome mediated reaction in the retina
3) The lagena
4) Vestibular canals (electromagnetic induction)
5) Supermagnetic macrophages in the liver.
Cristian Gutierrez-Ibañez
Researchers have identified superparamagnetic macrophages in the livers of rock pigeons to be crucial for magnetic sensing. The finding uncovers an unexpected role for immune cells in sensory perception and may fundamentally change our understanding of animal navigation.
https://scim.ag/4nTQ3nq
