A very disturbing report from bird experts who were not wireless-savvy to start with. Diana Kordas and her husband have been traveling through Greece and birdwatching for the past 20 years. In the spring of 2017, they visited northern Greece ... Diana writes: "We observed one significant change since our last visit in 2014. Many new cell towers have been installed and wireless coverage has increased exponentially. Highway corridors and major towns are now 4G/4G+, as are many beach resorts. In other vicinities which are still 3G, there are only a few areas with poor or no coverage. [This is] primarily due to Greece's mountainous terrain.
"We saw far fewer birds on this trip than on any other visit to the north of Greece. In some areas like the Nestos Delta, Porto Lagos, Lake Ismarida and the Evros Delta, there are virtually no birds at all. Most of the birds we did see congreated in areas of weak or no reception. Our observations suggest that small birds are more affected by ambient cell-tower electromagnetic radiation levels than larger birds, and there were nowhere near as many warblers, finches and small waders as we would have expected to see based on past experience and birder guidebook entries. Some species of bird were entirely absent, or represented by just one or two [individuals]."
Read this thorough and heart-rending report here.