Polar bears in Hudson Bay, in the north of Canada, stay on dry land. They wander, waiting for the cold to return, for the ice to reform so they can go seal hunting.
A team of scientists led by Anthony Pagano, a biologist at the United States Geological Survey (USGS) based in Anchorage, Alaska, followed the actions of twenty ursids for around twenty days. They monitored their daily energy expenditure, changes in body mass, diet, behavior and movements of each individual.