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