更新于：2026年3月11日 / 美国东部时间上午9:12 / CBS新闻
美国国家公园管理局表示，科学家本周早些时候在黄石国家公园发现了2026年的第一只灰熊，这标志着这种大型动物的冬眠季即将结束。
黄石公园的生物学家周一在公园北部区域工作时发现了这只熊。黄石公园位于怀俄明州西北部，栖息着150至200只灰熊。而在所谓的”大黄石生态系统”——包括蒙大拿州、爱达荷州和怀俄明州部分地区（超出了公园直接边界范围）——生活着超过1000只灰熊。
今年观察到的这只灰熊出现在偏远地区，正在以公园内另一种动物——公牛野牛的尸体为食。目击图像显示，这只熊站在黄石湖附近的尸体旁。
National Park Service/Jim Peaco
根据公园管理局的数据，今年首只灰熊的出现时间与往年相近：2025年3月14日、2024年3月3日，以及2023和2022年的3月7日。
雄性灰熊通常比雌性更早结束冬眠，通常在3月初离开巢穴。雌性和幼崽通常在春季稍晚些时候——4月和5月出现。
公园管理局表示：”当熊从冬眠中醒来时，它们会寻找食物，通常会食用冬季死亡的麋鹿和野牛。在食用尸体时，熊可能会对遇到的人表现出攻击性。”
灰熊目前根据《濒危物种法》被列为受威胁物种。在过去五十年中，它们从美国本土灭绝的边缘被拯救回来。黄石公园官员估计，1975年该地区灰熊数量已降至仅136只。但由于保护工作，科学家们认为灰熊种群状况良好，它们占据超过27000平方英里的栖息地，并在不断扩大活动范围。
https://www.cbsnews.com/video/grizzly-bears-in-yellowstone-put-trash-cans-and-coolers-to-the-test/
First grizzly bear of 2026 spotted at Yellowstone, feeding on bison carcass
Updated on: March 11, 2026 / 9:12 AM EDT / CBS News
Scientists spotted the first grizzly bear of 2026 earlier this week at Yellowstone National Park, marking the beginning of the end of hibernation season for the massive creatures, the National Park Service said.
Yellowstone biologists saw the bear on Monday while working in the northern section of the park, which is located in northwestern Wyoming and home to between 150 and 200 grizzlies. There are more than 1,000 grizzlies living across what’s called the “greater Yellowstone ecosystem,” an area covering portions of Montana, Idaho and Wyoming outside of the immediate park boundaries.
The grizzly observed this year was seen in the backcountry, scavenging on the carcass of a bull bison, another species found in the park. An image of the sighting showed the bear standing over the carcass near Yellowstone Lake.
National Park Service/Jim Peaco
This year’s first grizzly emerged around the same time as previous ones, with the season’s debut grizzly sighting taking place on March 14 in 2025, March 3 in 2024, and March 7 in both 2023 and 2022, according to the park service.
Male grizzlies typically leave hibernation before females, often exiting their dens in early March. Females and bear cubs usually emerge slightly later in the spring, in April and May.
“When bears emerge from hibernation, they look for food and often feed on elk and bison that died over the winter,” the park service said. “Bears may react aggressively to encounters with people when feeding on carcasses.”
Grizzly bears are currently listed as threatened under the Endangered Species Act, after they were brought back from the brink of extinction in the contiguous United States over the last five decades. Yellowstone officials have estimated that the grizzly bear population in the region had dropped to just 136 in 1975. But, thanks to conservation efforts, scientists now consider the population to be doing well, occupying more than 27,000 square miles and expanding their habitats.
https://www.cbsnews.com/video/grizzly-bears-in-yellowstone-put-trash-cans-and-coolers-to-the-test/
发表回复