Tree loss in the wintering grounds of the monarch butterfly in central Mexico is down by about 25% this year compared to last year as a sharp drop in Illegal logging more than made up from an increase in tree deaths due to lack of water or disease, experts said Monday.
Monarchs need healthy tree cover to protect them rain or cold weather in the pine and fir mountaintop forests in Mexico where they spend the winter. Millions of monarchs make the 3,400-mile (5,500-kilometer) migration from the United States and Canada, and then return, each year . . .
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