* Long-tailed Weasel: These weasels have a white winter coat and a brown summer coat.
* Short-tailed Weasel: Similar to the long-tailed weasel, they have a white winter coat and a brown summer coat.
* Least Weasel: The smallest weasel species, they also have a white winter coat and a brown summer coat.
* European Polecat: These weasels have a black and white coat with a distinctive black "mask" across their eyes.
Therefore, you cannot definitively say what color a weasel is without knowing the species and the time of year.