Bob Carty reports from Mexico on the threat to the winter home of the migratory monarch butterfly. The monarchs migrate 3000 miles a year between Canada and central Mexico, but the mountain forests which harbor them during the winter are slowly being felled by logging.
Bob Carty reports from Mexico on the threat to the winter home of the migratory monarch butterfly. The monarchs migrate 3000 miles a year between Canada and central Mexico, but the mountain forests which harbor them during the winter are slowly being felled by logging.