NBC Newsのインスタグラム(nbcnews) - 4月22日 01時06分

The iconic North American monarch #butterfly is in "substantial" danger of becoming "quasi-extinct" — despite recent population growth, according to a new study published in the journal Scientific Reports. Quasi-extinction means that the monarch butterfly would see its numbers dwindle so low that it may not be able to rebound. Search “monarch butterflies” on NBCNews.com for the complete story. #NBCNewsVideo #Science #Nature #Butterflies

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