Total number of UNESCO Biosphere Reserves Urban Sites: 0 (2019)
This description provides information on the total number of UNESCO Biosphere Reserves Urban Sites as of 2019. The number is 0, indicating that there are currently no UNESCO Biosphere Reserves Urban Sites in existence.
The Monarch Butterfly Biosphere Reserve is a World Heritage Site containing most of the overwintering sites of the eastern population of the monarch butterfly. The reserve is located in the Trans-Mexican Volcanic Belt pine-oak forests ecoregion on the border of Michoacán and State of Mexico, 100 km, northwest of Mexico City. Millions of butterflies arrive in the reserve annually. Butterflies only inhabit a fraction of the 56,000 hectares of the reserve from October–March. The biosphere's mission is to protect the butterfly species and its habitat.