Monarch Butterflies: The Last Migration

From 1999-2010, milkweed populations shrank 58% in the Midwest as agriculture adopted genetically modifed (GMO) crops that accept mass spraying of weed killer. And from 1999-2010 monarch egg production dropped by 81% in the Midwest. This now threatened insect migration--one of the largest of its kind in the world, stretching from central Mexico to southern Canada--is a calling out to restore native plants and ecosystems. Only 3% of the original tall grass prairie remains as each backyard becomes a 21st century wildlife refuge. Learn about the monarch--its migration and preferred host / nectar plants--and what you can do ensure its survival.