Unmanned remote cameras helped photographer Michael Nichols capture startling images of the endangered cats in their shrinking range.
老虎领域正在不断缩小，在其经常出没地区安装的无人遥控摄像机为摄影记者迈克尔.尼科尔斯抓拍到许多濒临灭绝的猫科动物。
Officials said the bears' range was shrinking because of the disappearance of sea ice linked to global warming.
官员们表示，全球变暖导致海洋冰面正在消失，引起北极熊活动范围急剧缩小。
Officials said the bears' range was shrinking because of the disappearance of sea ice linked to global warming.
官员们表示，全球变暖导致海洋冰面正在消失，引起北极熊活动范围急剧缩小。
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