There are other electromagnetic type things too, like use of light (camouflage, bioluminescence, eyes) and electricity (electric eels, bioelectrical cues for stem cell differentiation).
EDIT: Also the literal electrical potential within cells: the membrane potential, that is the voltage difference between inside and outside every cell.
https://en.wikipedia.org/wiki/Magnetoreception
There are other electromagnetic type things too, like use of light (camouflage, bioluminescence, eyes) and electricity (electric eels, bioelectrical cues for stem cell differentiation).
EDIT: Also the literal electrical potential within cells: the membrane potential, that is the voltage difference between inside and outside every cell.
An interesting area!