Did you known that some hamsters (like the Syrian Hamster) are territorial and they will fight other hamsters to the death if their territory is invaded?
Those same Syrian Hamsters store fruit to eat during the winter. What happens when you store fruit? It ferments and creates alcohol. So these Syrian Hamsters have evolved to be able to hold their liquor.
The name “hamster” comes from the German verb “to hoard” (hamstern). And even domesticated hamsters who get all the food they need can’t break themselves of the hoarding habit.
More fun hamster facts here: 11 Adorable Facts About Hamsters (Mental Floss)