Imagine flying over St. Lawrence Island and seeing colonies of two million seabirds. Nearby is a delta that contains some of the most significant waterfowl nesting habitat on earth. The Yukon-Kuskokwim Delta is home to the highest densities of nesting tundra swans, the majority of the world's emperor geese, and 50 percent of the world's black brant. This amazing sight is a result of the abundance of surface water in the Beringia Lowland Tundra ecoregion. Lakes and ponds cover 15 to 25 percent of the land, and wetlands cover between 55 and 78 percent. Steller's eiders also nest only here and in one area farther north.
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