One real tracked animal · Other
River lamprey
Lampetra fluviatilis
112 km tracked over 95 days.
Followed for 3 months, from December 2011 to April 2012, across 27 recorded positions.
It ranged between 51°N and 51°N, never leaving the northern hemisphere.
Remarkably, it stayed inside a narrow thermal band the whole time, between 6°C and 9°C.
It averaged 1.2 km a day, every day, across the whole tracking period.
It finished within 21 km of where it started, a round trip closed almost exactly.