Monarch蝴蝶面临严重的人口减少, 美国认为它们是濒危物种的保护。 Monarch butterflies face severe population declines, with the U.S. considering them for endangered species protection.

由于生境丧失、杀虫剂使用和气候变化,成年蝴蝶的数量正在下降,自1990年代以来,东部人口减少了80%以上,自1980年代以来,西部人口减少了95%。 Monarch butterfly populations are declining due to habitat loss, pesticide use, and climate change, with eastern populations down over 80% since the 1990s and western populations by 95% since the 1980s. 美国人 The U. S. The U.S. 鱼类和野生生物管理局正在考虑在12月4日之前根据《濒危物种法》将君主列入名单。 Fish and Wildlife Service is considering listing monarchs under the Endangered Species Act by December 4. 保护者敦促公众在南部州冬季报告发现君主鸟, Conservationists urge the public to report monarch sightings during winter months in southern states to help understand their migration and overwintering behaviors.