Mexico Butterflies : Monarch Population Falls 26 Percent

The population of Monarch Butterflies that arrived in Mexico's forests to hibernate this winter fell by 26 percent from the year before.

The conservationist Group WWF said that millions of orange and black monarch butterflies migrate to Mexico on a 2,000-mile journey each year from Canada across North America.

But the butterflies occupied only 2.1 hectares in last December, compared with 2.8 hectares the previous winter season.

The WWF said, climate change had a considerable impact on the butterflies' migration pattern, as well as the reduction in their milkweed breeding habitant in the united states.