The term PROTECTED ANIMAL can be summarized as an animal that is legally safeguarded from harm or exploitation. BISON, a five letter word, is an example of a protected animal. BISON are large, hoofed mammals native to North America and Europe. They are considered a keystone species, meaning their presence is essential for the health of their ecosystems. BISON have been hunted to near extinction in the past, but are now protected by law in many countries.