This video says about itself:
7 June 2016
The largest insect migration in the world ends each year in Michoacán, Mexico. Millions of monarch butterflies travel from the United States and Canada to pass the cold months in the towering trees of this beautiful forest. On their journey, the butterflies travel around 2,800 miles.
Damage to monarch butterfly colonies in 2016 storm worse than thought
Severe cold, snow, and high winds — and salvage logging that followed — weakened forest that protects declining butterfly
September 17, 2017
A much greater number of monarch butterflies perished in a snowstorm in March 2016 in Mexico than previously estimated, according to new research. Analysis of damage from the storm — and the ensuing salvage logging — sheds further light on the precarious state of the famed butterflies’ overwintering colonies.
Approximately 30-38 percent of the monarch…
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