At this very moment, the polar bears of Canada’s Hudson Bay are on the move, heading by the thousands to the icy shores, and you can watch them.

The northern hamlet of Churchill, Manitoba, known as “ the Polar Bear Capital of the World” lies directly in the path of this great migration, which the population of 800 is celebrating during Polar Bear Week, along with experts from Polar Bears International and videographers from explore.org. From November 1 to 7, anyone with an Internet connection can watch live footage of the bears from explore.org's five webcams, learn about current conservation efforts through webcast seminars and lectures, and take action against climate change.

Canada’s Hudson Bay is home to some of the largest populations of these threatened bears, who rely on the heavy ice pack to hunt their main prey—ringed and bearded seals. In the winter months, they’ll live entirely at sea—feasting on pinnipeds, sleeping, and even mating on the ice floes.

As Arctic sea ice continues to decline rapidly from rising temperatures, the bears' habitat is literally melting underfoot. Polar Bears International chief scientist Steven Amstrup predicts that 2/3 of all polar bears may be gone by 2050 if current warming trends continue. As you watch the predators sleep, play, scrounge and scramble across the Churchill tundra, consider what you can do to help protect the icy habitat they call home.