<P> The lesser snow goose travels through the Central Flyway, Mississippi Flyway, and Pacific Flyway across prairie and rich farmland to their wintering grounds on grassland and agricultural fields across the United States and Mexico, especially the Gulf coastal plain . The larger and less numerous greater snow goose travels through the Atlantic Flyway and winters on a relatively more restricted range on the Atlantic coastal plain . Traditionally, lesser snow geese wintered in coastal marsh areas where they used their short but strong bills to dig up the roots of marsh grasses for food . However, they have also since shifted inland towards agricultural areas, likely the cause behind the unsustainable population increase in the 20th century . This shift may help to contribute to increased goose survival rates, leading to overgrazing on tundra breeding grounds . </P> <P> In March 2015, 2,000 snow geese were killed in northern Idaho from an avian cholera epidemic while flying their spring migration to northern Canada . </P> <P> Outside of the nesting season, they usually feed in flocks . In winter, snow geese feed on left - over grain in fields . They migrate in large flocks, often visiting traditional stopover habitats in spectacular numbers . Snow geese frequently travel and feed alongside greater white - fronted geese; in contrast, the two tend to avoid travelling and feeding alongside Canada geese, which are often heavier birds . </P> <P> The population of greater snow geese was in decline at the beginning of the 20th century, but has now recovered to sustainable levels . Snow geese in North America have increased to the point where the tundra breeding areas in the Arctic and the saltmarsh wintering grounds are both becoming severely degraded, and this affects other species using the same habitat . </P>

Where do snow geese go in the summer