The Dual nature of Electro Magnetism, (Monopole) seems the origin of Pigeon homing and animal tracking.

According to Q-FFF Theory, Magnetism is based on two different shaped North and South string particles, produced by all spinning Fermions as "eigen energy" by the transformation of Virtual Vacuum particles by mechanical collision into real magnetic photons ( N+S)
Even Electric charge photons are the result of the same transformation. (into + and - string photons.) (see images)
All four strings are transformed into Vector bundels leaving the polarized Fermions.
As a consequence, the Earth magnetic field also shows such string radiation differences in special measurements (see"Image)

SEE:  Monopole Navigation 

https://www.flickr.com/photos/93308747@N05/albums/72157633287892650

Pigeons like other birds, Butterflies and Turles seem to be able to navigate solely on the Earth magnetic field. According to Quantum FFF theory, magnetic fields are just like electric fields based on monopole photonic information vector fields.

There are photon vector fields for electric negative and positive charge and for magnetic North and South potential.

( See second image of vector fields around the earth)

The boundary telescope (depicted above) is able to determine a so called fingerprint in the form of the half circle boundary shape of the two magnetic vector fields (North and South) at each location on earth. (see below).

The specific curvature of the half circle shaped boundary line (B) is the fingerprint observed to be unique for each location on earth..

The origin is the magnetic hotspots inside the earth created by former crashed Comets leaving also Volcanos behind.