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薄冰上的生活 - 国际北极熊日 - 每日必应壁纸

2026-02-28 03:00:56

北极熊幼崽走过浮冰, 北极国家野生动物保护区, 阿拉斯加州, 美国 (© Steven Kazlowski/naturepl.com)

根据国际自然保护联盟（IUCN）的评估，北极熊被列为易危物种，全球种群数量估计约22000至31000只。

2月27日是国际北极熊日，聚焦与冰封世界紧密相连的“北极巨兽”。作为世界上最大的陆地食肉动物，北极熊会为寻找食物在辽阔的极地景观中跋涉数百英里。它们高度适应海冰生活：宽大的前掌跨度可达约一英尺，不仅能稳稳踏雪行走，也能在冰冷海水中游出数英里。

这个时节尤为关键，因为母熊和刚出生的幼崽会躲在雪洞中度过最严酷的阶段。这些洞穴通常掩藏在厚厚的积雪里，为北极严冬提供温度与安全。幼崽出生时极其微小，体重仅约一磅，在春天踏出雪洞、学会独立之前，它们完全依赖母熊生存。

国际北极熊日提醒我们：不断缩小的海冰正在威胁这一生命循环。通过减少碳排放、支持保护行动，我们可以帮助守护北极熊赖以生存的北极栖息地。每一次行动，都在为它们的未来加一分力量。

International Polar Bear Day

International Polar Bear Day underscores how closely these Arctic giants are tied to their frozen realms. Celebrated on February 27, the day shines a light on polar bears and the rapidly changing world beneath their paws. The world's largest land carnivores roam across vast icy landscapes, sometimes covering hundreds of miles in search of food. They're perfectly adapted to life on sea ice, with large paws that can span nearly a foot and help them swim for miles.

This time of year is especially important because it's when mothers and their newborn cubs stay tucked inside snow dens. These chambers, often dug into deep drifts, provide warmth and safety during the harsh Arctic winter. Cubs are tiny at birth—about one pound—and rely completely on their mother for survival until they're strong enough to venture out in spring.

International Polar Bear Day reminds us that shrinking sea ice threatens this cycle. By reducing carbon emissions and supporting conservation efforts, we can help protect the vast Arctic habitats polar bears depend on. Every action counts toward their future.

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