Migration is a way of life for most birds found in Ireland. Our nation sits with its back to the Old World and its face to the New World so the variety of bird species reaching our shores is derived from two hemispheres. From across the planet our birds come to breed stop off or spend the winter. How these visitors reached our shores puzzled us for centuries. So how do birds navigate so successfully over enormous distances and make a return trip to the same nesting site each year Modern tracki