Editing Magnetoreception (section)

== Unanswered questions ==

It remains likely that two or more complementary mechanisms play a role in magnetic field detection in animals. Of course, this potential dual mechanism theory raises the questions of to what degree each method is responsible for the stimulus, and how they produce a signal in response to the weak magnetic field of the Earth.<ref name="Rodgers Hore 2009" />

In addition, it is possible that magnetic senses may be different for different species. Some species may only be able to detect north and south, while others may only be able to differentiate between the equator and the poles. Although the ability to sense direction is important in migratory navigation, many animals have the ability to sense small fluctuations in earth's magnetic field to map their position to within a few kilometers.<ref name="Rodgers Hore 2009" /><ref>{{cite journal |last=Gould |first=J. L. |year=2008 |title=Animal navigation: The evolution of magnetic orientation |journal=[[Current Biology]] |volume=18 |issue=11 |pages=R482–R48 |doi=10.1016/j.cub.2008.03.052 |pmid=18522823 |s2cid=10961495 |doi-access=free |bibcode=2008CBio...18.R482G }}</ref>