This video is about an European hamster.
Lia van Harskamp made this video in September 2014 in Limburg province in the Netherlands.
A diet of corn turns wild hamsters into cannibals, by Sarah Zielinski, 9:00am, February 7, 2017: here.
Analysis of the first fully-sequenced genome of the Siberian hamster shows how these small, seasonal breeders adapt their bodies and energy usage to survive the winter. The study shows that shifting day length alone was enough to trigger these changes, regardless of temperature or how much food is available: here.