In the early 1900s only a few thousand snow geese migrated along the Atlantic flyway from their nesting grounds in the eastern Arctic through Northern Quebec and the eastern U.S. By 1970 the population had grown to 100,000. Today, it's more than 900,000. A blizzard of snow geese is an amazing sight when viewed from a designated sanctuary such as the Dead Creek Wildlife Management area in Addison, Vermont. But these numbers also mean a devastating effect on habitat. A large concentration of geese can turn a salt marsh into a mud flat as they grub, ripping up large grasses by the roots and destroying habitat for other birds. And as the population grows, it has a particularly negative impact on the birds' nesting habitat — the habitat they need for the young to survive. The U.S. Fish & Wildlife Service has now come to depend on hunters to help bring the snow goose population under control and reduce it to the carrying capacity of the habitat. Surprisingly, although the concentration of snow geese that are migrating is huge, the odds are in the favor of the birds to make it past hunters. Hunting snow geese requires dedication, teamwork and ideal weather conditions to even get the birds to look your way. And it means decoys — lots of them. And they have to be in place early. To get the 500 to 1,000 decoys in place by the time the sun comes up, the wake-up call is two o'clock in the morning for one group of dedicated hunters. It means a frantic criss-crossing in the dark, wearing headlamps to get the decoys and coffin blinds positioned in a farm field. And even with a mixture of full-body decoys, silhouettes, shells and kites, there is no guarantee the birds will come in. A sunny day can mean a long wait as light reflects off the shiny fake birds, warning the real ones to stay away. What you're looking for is high wind and dark days. But for those with the patience, good calling skills and the luck of the weather, the sight of forty or fifty birds "whiffling" in on the wind and into range is worth every minute of preparation. In this segment, Lawrence Pyne joins a group of hunters in the pre-dawn hours as they prepare for a snow goose hunt.