Baby weasels are almost full grown at the age of four. Weasels are mostly nocturnal. They hunt at night. In fact, summertime brings almost twenty-four hours of daylight to the weasel in the far north. They can also climb and swim through almost any hole or cranny.
Weasels are very good predators.
They try to bite their prey in the back of the neck and they can successfully kill prey that is bigger than themselves. Weasels are very fast and can follow the path of their prey. A weasel's shape can allow it to follow the animal right into the animal's burrow. The ermine and the long tailed weasels are common. The least weasel is the most uncommon weasel.