Wassies are a biological species that first surfaced around 1957 following a terrible radioactive accident. Generally resembling some sort of cross between a duck, penguin, platypus and rat (depending on strain), Wassies are easily identified by their fatally low intellectual abilities.
Wassies are a radioactive byproduct and thus come in a variety of different strains. The most common strains physically resemble a cross between a duck, penguin and platypus and the species generally have social behaviors similar to rats.