From the "ecoholic" column in Toronto's Now Magazine;

According to a new survey by the World Wildlife Fund and Mexico's National Commission of Protected Natural Areas, there has been a 69 per cent increase in the size of monarch butterflies' hibernating area in Mexico over the last year. Good news for nature lovers and the environment, although the WWF notes that "this is still the second-smallest area occupied by these butterflies in Mexican sanctuaries since 1993." The group warns that North America needs to stop the herbicide use and land conversion that are destroying the milkweed monarchs depend on for survival.