Millions of monarch butterflies spend the winter at Sierra Chincua in Mexico, one of only five places on earth where monarchs winter before migrating back north in spring. Logging threatens this gathering – after forest was cleared from one of the sites, the monarchs stopped visiting it. Even though the area is a World Heritage site with 56,000 hectares set aside, logging continues.
Millions of monarch butterflies (Danaus plexippus) roost on the Sierra Chincua (Chincua mountain) near Angangueo, Mexico. This is one of five wintering roosts for monarchs, where the cool mountain climate slows their metabolism enough for them to overwinter before migrating back northward in the spring. Logging threatens this spectacle: already one of the five sites is no longer used by the butterflies due to the forest being cleared.