レオナルド・ディカプリオさんのインスタグラム動画 - (レオナルド・ディカプリオInstagram)「Repost from @washingtonpost • Every year, millions of monarch butterflies make their way across North America to spend winters in the same forests of central Mexico’s Michoacán state — a phenomenon that remains an evolutionary mystery. But in just one year, the population of monarch butterflies wintering in those hillsides dropped 22 percent, according to a World Wildlife Fund (WWF) Mexico report released last week. Monarch butterflies are considered one of the world’s oldest and most resilient species. Their life cycles depend on optimal conditions: temperatures between 55 and the low 70s when they migrate, an abundance of milkweed when they mate, and some rain during the winters. But climate change has scrambled the consistent weather patterns they rely on, and more butterflies are dying. Read more through the link in our bio.」4月14日 5時57分