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Everyday electronics may upset birds’ compass

Weak electromagnetic waves interfere with European robins’ migratory orientation

7:50am, May 8, 2014

IFFY COMPASS  The European robin, a different species from what North Americans call a robin, can mysteriously lose its compass sense when exposed to an urban background of weak electromagnetic noise.

A background buzz of electromagnetic waves from such ordinary sources as electronic equipment can interfere with a bird’s magnetic compass, according to a particularly careful set of experiments.

Normally, migratory birds held in captivity during their travel season tend to hop, face and fidget in the direction they would fly. But caged in huts at a German university, European robins (Erithacus rubecula) failed to orient in their usual migratory direction unless researchers screened out the campus’s background electromagnetic frequencies, says Henrik Mouritsen of the University of Oldenburg in Germany. Yet the robins oriented normally in a rural area with less electromagnetic background, he and colleagues report May 7 in Nature.

Previous claims that typical background levels of electromagnetic emissions affect biological processes have been outright debunked or questioned. But this set of

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