The Eastern monarch butterfly that summer in the Midwest and Canada and migrate to Mexico for winter have seen a dramatic decline in their numbers over the past two decades, especially from last year to this year, according to conservation scientists at a news conference in Mexico City. Researchers looked at oyamel fir forests in south-central Mexico and found that 2.2 acres were being used for roosting, as compared to 5.5 acres last year. Gloria Tavera, the Director of Conservation at the National Commission of Natural Protected Areas, said that is the second smallest count compared 2013-2014, which had the smallest count ever. MORE: https://www.cbs8.com/article/news/local/outreach/earth8/monarch-butterfly-population-decline/509-94bf61bf-cb29-4e8c-b54c-b8584bca8017