One of the surest signs of spring here in the Northwoods is the arrival of flocks of Canada geese. You may not have given it much thought, this year or any year, but Aldo Leopold did. I thought I heard geese honking recently. Above the din of the noisy road outside, and the noisy family inside, I strained my ears to make sure. One of my boys saw me concentrating, appearing puzzled. “I think I hear geese” I told him. He replied that he had heard geese the day before. He attends Rhinelander High