Mexico Monarch Butterfly

Monarch Butterflies sit on a tree trunk at the Sierra Chincua Sanctuary, in the mountains of Mexico’s Michoacan state, Friday, Dec. 9, 2011. The Monarch butterflies arrive in central Mexico usually around the first week of November, after their yearly 4000-kilometer (some 2500 miles) migration from Canada and begin their return around March. (AP Photo/ Marco Ugarte) *** Local Caption *** 71785637