Remarkable animal journeys

Polar bears – A new study has found polar bears swim continuously for nine days over 420 miles to reach new ice floes. Scientists are concerned that the bears are having to swim further as the ice melts because of global warming.
Monarch butterflies - The tiny insect flies up to 2,000 miles, mostly from North America to Mexico. The migration is so long it takes more than one lifecycle, leaving the next generations to return to a place they have never been before.
Ospreys - Scientists who satellite-tracked ospreys from Sweden to their wintering grounds in Africa through Spain found the birds travelled an average distance of 4,200 miles over around 45 days. The birds also visit Scotland and northern England from Africa.
Whales - Eastern North Pacific gray whales make a mammoth 12,400 mile round trip between their southern breeding grounds off Baja California, Mexico and their northern feeding grounds off Alaska and the Beaufort Sea.
read more