Monarch Population Status

World Wildlife Fund Mexico in collaboration with CONANP and the Monarch Butterfly Biosphere Reserve (MBBR) announced the total forest area occupied by overwintering monarch colonies this week. Nine (9) colonies were located this winter season with a total area of 2.48 hectares, a 14.77% decrease from the previous season:

Figure 1. Total Area Occupied by Monarch Colonies at Overwintering Sites in Mexico

We will provide additional details as we receive and process them.

WWF release (in spanish): Superficie forestal ocupada por las colonias de hibernación de la mariposa monarca en México durante Diciembre de 2017.