Monarch butterfly colonies in Mexico more than doubled in size this winter after bad storms devastated their numbers a year ago, conservationists said on Monday although the migrating insect remains under threat.
Millions of butterflies make a 2,000-mile journey each year from Canada to winter in central Mexico's warmer weather but the size of that migration can vary wildly.
This famous beach resort, which will next week host international climate change talks, was itself born from the destruction of a potent resource to fight global warming.
Thick mangrove forests lined the canals and waterways here before developers dredged the land to make way for the upscale hotels that now draw several million tourists every year.
