** Migratory birds have been found to use Earth's magnetic field to calculate their geographical position, similar to a GPS system. Research on Eurasian reed warblers has shown that they can detect detailed aspects of the magnetic field, including inclination and declination, to determine their location.

**

Source: https://www.newscientist.com/article/2455948-migratory-birds-can-use-earths-magnetic-field-like-a-gps/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home