does the first animal has any links to prehistoric period?
Yes, during the Pleistocene period, muskoxen were much more widespread.
Muskox
During the Pleistocene period, muskoxen were much more widespread.
where did the polar bear live with her family In the Arctic Circle, encompassing the Arctic Ocean what do they eat? ringed and bearded seals are they very strict about their diet? No. in what way? They consume a wide variety of other wild foods, including muskox birds, eggs, rodents, crabs, other crustaceans and other polar bears. did these birds exist since prehistoric days? UNANSWERABLE
wiki:7456879
Muskox [SEP] Prehistory
During the Pleistocene period, muskoxen were much more widespread. Fossil evidence shows that they lived across the Siberian and North American Arctic, from the Urals to Greenland. The ancestors of today's muskoxen came across the Bering Land Bridge to North America between 200,000 and 90,000 years ago. During the Wisconsinan, modern muskox thrived in the tundra south of the Laurentide Ice Sheet, in what is now the Midwest, the Appalachians and Virginia, while distant relatives "Bootherium" and "Euceratherium" lived in the forests of the Southern United States and the western shrubland, respectively. Though they were always less common than other Ice Age megafauna, muskox abundance peaked during the Würm II glaciation 20,000 years ago and declined afterwards, especially during the Pleistocene/Holocene extinction event, where its range was greatly reduced and only the populations in North America survived.