An accelerating decrease in summer sea-ice extent in the Arctic Ocean and Canadian Arctic Archipelago (North-west Passage) is predicted to increase the movement of species between the North Pacific and North Atlantic oceans. Here we report observations of two Subarctic North Pacific puffin species in the North Atlantic near the coast of north-west Greenland. We observed a horned puffin (Fratercula corniculata) repeatedly during the summer months of 2002–06 and 2013–19 and a single tufted puffin (F. cirrhata) in 2019. While single tufted puffins have been observed a few times in the North Atlantic, this is the first record of a horned puffin in the North Atlantic, and the first record for both horned and tufted puffins in north-west Greenland. In 2019, both puffin species were observed simultaneously at an Atlantic puffin (F. arctica) colony.

中文翻译：

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北大西洋有角海雀和高北极格陵兰岛有簇状海雀的首次记录

预计北冰洋和加拿大北极群岛（西北航道）夏季海冰范围的加速减少将增加北太平洋和北大西洋之间的物种移动。在这里，我们报告了对格陵兰岛西北部海岸附近北大西洋中两种亚北极北太平洋海雀物种的观察结果。我们在 2002-06 年和 2013-19 年的夏季反复观察到了一只角海雀 (Fratercula corniculata)，并在 2019 年观察到了一只单簇海雀 (F. cirrhata)。虽然在北大西洋曾多次观察到单簇海雀，这是北大西洋角海雀的首个记录，也是格陵兰岛西北部角海雀和簇状海雀的首个记录。2019 年，在大西洋海雀 (F. arctica) 殖民地同时观察到这两种海雀。