Millions of Monarch Butterflies Make the Mexican Forest Their Home for the Winter
Every year, millions of monarch butterflies travel up to 2,800 miles to the forests of Central Mexico to escape the cold. After braving the elements, these butterflies turn Mexico's Monarch Butterfly Biosphere Reserve into an orange-and-black wonderland. From October to March, they carpet the trees and the ground as they rest, reproduce, and get ready for the trip back north in the spring.