Bird bands are neat finds. I have found 2 Goose, 1 Duck, and 1 Pigeon band. If you write to the address ( or Google them these days ) they will send you the information on where and when the bird was banded, which will tell you how old the band is. Some of them in Illinois, are even "reward" bands in the amount of $50.00 and $100.00 to encourage the finder or hunter to call the band in so they can track their info on it. Nice find.