Followed for 2 years, from May 2018 to May 2020, across 722 recorded positions.
It ranged between 53°N and 76°N, never leaving the northern hemisphere.
The water and air it moved through ran from 1°C to 14°C.
It averaged 29 km a day, every day, across the whole tracking period.
It finished 233 km from where it started, roughly back in the same region.
Of the 320 species followed here, this animal covered more ground than 77% of them.