Monarch butterflies are one of nature's true wonders, fluttering thousands of kilometres across North America despite weighing less than a paperclip.
Over the past two winters, numbers of monarchs overwintering in Mexico hit an all-time low, dropping from more than a billion to less than 60 million this past winter.
Severe weather and the virtual eradication of milkweed throughout much of their migratory path between Canada and Mexico have put the monarchs' epic migration back to Canada at risk.
Milkweed is the only plant that monarch butterflies lay their eggs on and is the primary source of food for monarch caterpillars. Scientists throughout North America have identified milkweed planting as the most important action people can take to help support threatened monarch populations.
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