there seems to be some who want to use the rarest most expensive fur or feathers to make flies with regardless of what it may do to a species long term" Lunn, N. J.; Stirling, I. (1985). "The significance of supplemental food to polar bears during the ice-free period of Hudson Bay". Canadian Journal of Zoology. 63 (10): 2291–2297. doi: 10.1139/z85-340.

Shields, G. F.; Adams, D.; Garner, G.; Labelle, M.; Pietsch, J.; Ramsay, M.; Schwartz, C.; Titus, K.; Williamson, S. (2000). "Phylogeography of mitochondrial DNA variation in brown bears and polar bears". Molecular Phylogenetics and Evolution. 15 (2): 19–26. doi: 10.1006/mpev.1999.0730. PMID 10837161. Polar bears are both terrestrial and pagophilic (ice-living) and are considered to be marine mammals due to their dependence on marine ecosystems. They prefer the annual sea ice but live on land when the ice melts in the summer. They are mostly carnivorous and specialized for preying on seals, particularly ringed seals. Such prey is typically taken by ambush; the bear may stalk its prey on the ice or in the water, but also will stay at a breathing hole or ice edge to wait for prey to swim by. The bear primarily feeds on the seal's energy-rich blubber. Other prey include walruses, beluga whales and some terrestrial animals. Polar bears are usually solitary but can be found in groups when on land. During the breeding season, male bears guard females and defend them from rivals. Mothers give birth to cubs in maternity dens during the winter. Young stay with their mother for up to two and a half years. Of the world’s estimated 25,000 Polar Bears in 2014 around 16,000 or 65% are thought to live in the arctic regions of Canada.Canino, W.; Powell, D. (2010). "Formal behavioral evaluation of enrichment programs on a zookeeper's schedule: a case study with a polar bear ( Ursus maritimus) at the Bronx Zoo". Zoo Biology. 29 (4): 503–508. doi: 10.1002/zoo.20247. PMID 19373879.

a b c Lan, T.; Leppälä, K.; Tomlin, C.; Talbot, S. L.; Sage, G. K.; Farley, S. D.; Shideler, R. T.; Bachmann, L.; Wiig, Ø; Albert, V. A.; Salojärvi, J.; Mailund, T.; Drautz-Moses, D. I.; Schuster, S. C.; Herrera-Estrella, L.; Lindqvist, C. (2022). "Insights into bear evolution from a Pleistocene polar bear genome". Proceedings of the National Academy of Sciences. 119 (14): e2200016119. Bibcode: 2022PNAS..11900016L. doi: 10.1073/pnas.2200016119. PMC 9214488. PMID 35666863. Nachtigall, P. E.; Supin, A. Y.; Amundin, M.; Röken, B.; Møller, T.; Mooney, T. A.; Taylor, K. A.; Yuen, M. (2007). "Polar bear Ursus maritimus hearing measured with auditory evoked potentials". Journal of Experimental Biology. 210 (7): 1116–1122. doi: 10.1242/jeb.02734. PMID 17371910. S2CID 18046149.Mother polar bears typically give birth to two cubs per litter. As with other bear species, newborn polar bears are tiny and altricial. [127] The newborns have woolly hair and pink skin, with a weight of around 600g (21oz). [10] [29] Their eyes remain closed for a month. [128] The mother's fatty milk fuels their growth, and the cubs are kept warm both by the mother's body heat and the den. The mother emerges from the den between late February and early April, and her cubs are well-developed and capable of walking with her. [129] At this time they weigh 10–15 kilograms (22–33lb). [10] A polar bear family stays near the dens for roughly two weeks; during this time the cubs will move and play around while the mother mostly rests. They eventually head out on the sea ice. [130] Mother nursing her young

Durner, George M.; Douglas, David C; Nielson, Ryan M; Amstrup, Steven C; McDonald, Trent L (2007). Predicting the Future Distribution of Polar Bear Habitat in the Polar Basin from Resource Selection Functions Applied to 21st Century General Circulation Model Projections of Sea Ice (PDF) (Report). USGS . Retrieved 20 September 2023. Derocher, A. E.; Van Parijs, S. M.; Wiig, Ø (2010). "Nursing vocalization of a polar bear cub". Ursus. 21 (2): 189–191. doi: 10.2192/09SC025.1. S2CID 55599722. Polar bears roam the Arctic ice sheets and swim in that region's coastal waters. They are very strong swimmers, and their large front paws, which they use to paddle, are slightly webbed. Some polar bears have been seen swimming hundreds of miles from land—though they probably cover most of that distance by floating on sheets of ice. Arctic Adaptationsa b c Ovsyanikov, N. G. (2005). "Behavior of polar bears in coastal congregations" (PDF). Zoologicheskiĭ Zhurnal. 84 (1): 94–103.