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Human impacts on the Earth's magnetic fieldThen again, perhaps any magnetic changes of a natural kind may also play a role? Earth's magnetic field is weakening 10 times faster now
Humans have an impact on so many aspects of the earth's ecology. While wrangling with the magnetic field might seem like an activity that is out of our reach, human-induced electromagnetic noise could be a concern for migrating animals.
In a 2014 study published in the journal Nature, laboratory studies on robins showed birds that were exposed to background electromagnetic noise had trouble discerning which way was south.
While other studies have not seen the same impact from everyday background noise, it's prudent to be aware that human-induced electromagnetic disturbances could have an impact on some animals' highly-tuned sensory systems.
Comment: Maybe some change in the planet's environment is interfering with this bird's ability to correctly utilise the Earth's magnetic field to navigate by? See also this: Animal Magnetism: How the magnetic field influences animal navigation
Extract - Then again, perhaps any magnetic changes of a natural kind may also play a role? Earth's magnetic field is weakening 10 times faster now