Geography of Canada Canada's territory as sparsely populated wilderness; Canada's population density is 3.5 people/km (9.1/mi), among the lowest in the world. Despite this, 79.7 percent of Canada's population resides in urban areas, where population densities are increasing. Canada shares with the U.S. the world's longest undefended border at ; are with Alaska. The Danish island dependency of Greenland lies to Canada's northeast, separated from the Canadian Arctic islands by Baffin Bay and Davis Strait. The French islands of Saint-Pierre and Miquelon lie off the southern coast of Newfoundland in the Gulf of St. Lawrence and have a maritime territorial enclave within Canada's
Baffin Island to the southern part in winter, even to the Frobisher Bay peninsula, next to Resolution Island and migrate back north in the summer. In 2012, a survey of caribou herds found that the local population was only about 5000, a decrease of as much as 95% from the 1990s. Polar bears can be found all along the coast of Baffin Island, but are most prevalent where the sea ice takes the form of pack ice, where their major food sources — ringed seals (jar seal) and bearded seals — live. Polar bears mate approximately every year with from one to