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 your enamel correspond to seasonal variants and show that Polish woolly mammoths inhabited southern Poland during winter but grazed the Polish midlands during summer time.[59] https://www.youtube.com/channel/UCCoZfLHRsYsRsVHqS-CSAWA