Mobile link to bee decline.
Now, thanks to a Swiss researcher at the Ecole Polytechnique Federale (EPFL) in Lausanne, we may be close to unravelling the mystery. In a series of 83 experiments, Daniel Favre, a former-biologist with the institute, proved that mobile phone signals have a direct effect on bee behaviour. Using two hives, Favre conducted his experiments by placing a mobile phone next to each one and monitoring stress levels among the bees.
He found that each time a call was established on one of the phones, the humming of the stressed hive residents increased nine-fold--from 450 Hz to over 4,000 Hz--within just half an hour. In an interview with the French-language newspaper Le Matin, Favre explained that this showed that mobile telephony was a massive disturbance to bees, and could also be a reason for many insects abandoning their hives.