A new report says that monarch butterfly colonies currently occupy the smallest area since records began in 1993. National Geographic reported a 44% drop in butterflies hibernating at Mexico’s Monarch Butterfly Biosphere Reserve from 2012 to 2013. But it’s not what you think. It’s not the monarch’s themselves that are endangered, it’s their migration from Canada to Mexico and back. Environmental changes and the loss of milkweed in North America are changing the butterflies’ migration habits. But we can save the migration now! Researchers say it will require a joint effort of all three North American countries to plant milkweed on a large scale to feed the butterflies to bring them here.