Woolly Mammoth dental enamel from Poland has demonstrated that woolly mammoths had been seasonally migratory. Recurring shifts in δ18O and 87Sr/86Sr present in levels of the enamel correspond to seasonal variations and show that Polish woolly mammoths inhabited southern Poland in the course of Wintertime but grazed the Polish midlands https://www.youtube.com/channel/UCCoZfLHRsYsRsVHqS-CSAWA