Woolly Mammoth dental enamel from Poland has demonstrated that woolly mammoths have been seasonally migratory. Recurring shifts in δ18O and 87Sr/86Sr located in layers of the enamel correspond to seasonal variations and show that Polish woolly mammoths inhabited southern Poland through Wintertime but grazed the Polish midlands all through summertime.[59] https://www.youtube.com/channel/UCCoZfLHRsYsRsVHqS-CSAWA