ナショナルジオグラフィックさんのインスタグラム写真 - (ナショナルジオグラフィックInstagram)「Photo by Daniella Zalcman @dzalcman / It's currently fall migration season for monarch butterflies, some of whom are traveling up to 3,000 miles south to overwinter in the southern United States and Mexico. The trip is fraught, with dangers ranging from storms to pesticides to deforestation to climate change. The 2019-2020 season saw a 53 percent decrease in the number of monarchs that made it to one particular protected forest in Mexico—an alarming trend for the future of this important pollinator. Travel safe, friends!」11月25日 8時35分