Grey seal sleeping on the beach, Orkney Islands, Scotland

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Not all wildlife moments are dramatic—some unfold in perfect stillness. The grey seal resting on the shores of the Orkney Islands, Scotland, is a perfect example. Grey seals are among the UK's largest native marine mammals, with the country supporting around 40% of the world's population. Despite their size, they are remarkably adaptable sleepers. Rather than settling into one long stretch, grey seals nap in short, flexible bursts shaped by their surroundings.