From the Pioneer Press in the USA:
Monarch migration doubles from 2010
Updated: 02/15/2011 12:52:16 AM CST
MEXICO CITY — The number of monarch butterflies migrating from Canada and the U.S. to Mexico has increased this year, a hopeful sign after a worrying 75 percent drop in their numbers last year, experts reported Monday. The total amount of forest covered by the colonies — millions of orange-and-black butterflies that hang in clumps from the boughs of fir trees — more than doubled from last year's historic low.