Searching, Always Searching

In western Hudson Bay, Canada, near the southern extent of their range, polar bears (Ursus maritimus) may fast for periods of 4 months or longer. Except for pregnant females they do not den, but rather they engage in what is termed “walking hibernation” and are always foraging. These fasting polar bears that remain active have much higher energy demands, with metabolic rates similar to the basal metabolic rates of mammals in general. The degree to which polar bears can derive sufficient energy during prolonged periods of fasting affects individual survival. They can lose up to one-half their body mass.
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EF 70-200mm + 2x @ 190mm; f/9.5 @ 1/250 sec, -1 EV, ISO 100

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Oh those feet!! So massive. Thanks for all the interesting info on them, too. I hope as the polar region melts they don’t die off and can adapt somehow. It would be a shame to lose them and losing such a dominant apex predator will have repercussions we can’t even imagine.

Thank you, Ms. Smith. Indeed, their feet are massive and have hair on their soles. Custom-made snowshoes (adaptations) to support their weight, improve traction and reduce noise when walking on snow and ice. Arctic temperatures won’t change overnight, unless we have another meteor collision as happened near the Yucatan, so the bears and other arctic dwellers will slowly move farther north. The principle problem is loss of sea ice, the primary hunting areas for polar bear.

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Always searching because they have to maintain huge size.
like the whites here.

Thank you Jagdeep. You are correct. They need to maintain their body mass. The farther north animals inhabiting this planet live, the larger they are. It is an adaptation to facilitate heat conservation—thermoregulation.