The US Fish and Wildlife Service said that nearly a billion monarchs have disappeared from overwintering sites since 1990.

美国鱼类和野生动物管理局表示，自1990年来，近十亿只帝王蝶在越冬地点消失了。

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The US Fish and Wildlife Service carefully monitors and manages the wolf packs in Yellowstone.

美国鱼类和野生动物管理局对黄石公园的狼群进行了仔细的监控和管理。

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Polar bear patrols are carried out daily by the local community and the US Fish and Wildlife Service.

北极熊每日动向由本地和美国鱼类和野生动物组织负责。

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The director of the US Fish and Wildlife Service acknowledged there would be opposition to the decision.

BBC: Wyoming drops federal protection of gray wolves

At his office near Bellingham, Washington, Special Agent Paul Weyland of the US Fish and Wildlife Service pulls a large plastic bag out of a freezer.

NPR: Poaching Sheds Light on Market for Eagle Parts

The US Fish and Wildlife Service must now decide whether to list the polar bear as endangered, or to put it in a lesser category of risk such as threatened, or to keep it off the list entirely - an option which would immediately lead to further legal action from the conservation coalition.

BBC: US ordered to act on polar bear