http://www.boingboing.net/2010/03/01/birds-have-built-in.html?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+boingboing%2FiBag+%28Boing+Boing%29
First thing I thought of was to build a degaussing coil into my home's chimney
(Sorry Chris, it was...)