Behavioral evidence indicates that there are magnetoreceptors in the beak of birds. These receptors include magnetite, as indicated by the pulse experiments, and they mediate their input to the brain by the ophthalmic nerve and the trigeminal system.

Do all birds have magnetite?

Magnetite has been found in the upper beaks of several birds, but until recently, there has been little evidence that the substance is connected with navigation[5]. Late last year, a study published in Nature presented evidence that some birds do navigate using magnetite.

Do birds have magnetite in their beaks?

Researchers have discovered a small spot on the beak of pigeons and some other birds that contains magnetite. Magnetite is a magnetized rock, which may act as a tiny GPS unit for the homing pigeon by giving it information about its position relative to Earth's poles.