Thanks for the great post about an cool topic. A cab driver in Chicago once told me he was involved in pigeon racing here in the US. He had been doing it for many years and it's interesting to note that he believes the cell phone towers can mess up the pigeons homing instincts. He said it used to be 100 out of 100 of the birds would make it to the finish line, but now it's only 95 out of 100.