Monarch butterflies spend their winters in fir forests on a dozen mountaintops in central Mexico, their colorful wings turning the trees orange. They make their way north, many toward the Great Lakes, to breed in the spring and summer.
But this familiar North American species is in trouble: Almost a billion strong in the mid-1990s, the population has declined by more than 80%. Researchers believe that one cause is the loss of milkweed, the prairie plant species on which monarchs feed and breed.
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http://eprijournal.com/how-can-the-power-industry-help-the-monarch-butterfly/?platform=hootsuite
http://eprijournal.com/wp-content/uploads/2019/04/2019.03-D1_MonarchButterfly.pdf
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