Seabirds rarely cross major terrestrial barriers during seasonal migration, possibly because they have a limited ability to build up fat stores. For the first time, we tracked two Ivory Gulls with GPS loggers during spring migration from the wintering area in Davis Strait to the breeding colony in north‐east Greenland. While one bird migrated in March around the southern tip of Greenland, the other delayed migration until May and crossed the Greenland icecap north of 70°N, covering 1345 km in 29 h. Several aspects of the crossing were noteworthy: the track was remarkably direct, the bird made several stops (totalling 6 h) on the icecap, and the bird increased its flying altitude to nearly 3000 m over West Greenland and > 4000 m over East Greenland.

中文翻译：

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在北极高海鸟象牙鸥Pagophila eburnea中确认了跨冰盖的春季迁移

海鸟在季节性迁徙期间很少越过主要的陆路障碍，可能是因为它们建立脂肪库的能力有限。在春季从戴维斯海峡越冬地区迁移到格陵兰东北部的繁殖地期间，我们首次使用GPS记录仪跟踪了两个象牙海鸥。虽然一只鸟在3月围绕格陵兰岛的南端迁徙，另一只鸟则推迟到5月迁徙并越过70°N以北的格陵兰冰盖，在29小时内覆盖了1345公里。穿越的几个方面值得注意：轨道非常直，鸟在冰帽上停了好几站（总共6个小时），鸟的飞行高度增加到西格陵兰岛近3000 m，东格陵兰岛> 4000 m。