Researchers at a news conference in Mexico City explained why the number of Eastern monarch butterflies has declined dramatically. Here's what you can do to help.
MEXICO CITY The number of monarch butterflies at their wintering areas in Mexico dropped by 59% this year to the second lowest level since record keeping began, experts said Wednesday, blaming heat, drought and loss of habitat.
The number of monarch butterflies at their Mexico wintering sites has plummeted this year netscape.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from netscape.com Daily Mail and Mail on Sunday newspapers.