A small colony of red - crowned cranes in Hokkaido did not migrate, since the birds were able to feed during the winter months along streams located near hot springs.
Hokaido salā kāda neliela Japānas dzērvju kolonija ziemā nelidoja projām, jo upēs un strautos, kas tek karsto avotu tuvumā, putni arī aukstajos mēnešos varēja sameklēt sev barību.