Little else was known about the 30-40 day moult, until Fretwell spotted large brown smudges in satellite pictures from 2019-2025. They turned out to be mounds of feathers, left in an area called Marie Byrd Land.
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Cluster & Border Point Definition: The map is divided into clusters, and border points are identified using the Ford-Fulkerson based method.，推荐阅读搜狗输入法2026获取更多信息
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