Final answer:
Ungulates such as wild pig, axis deer, fallow deer, red deer, and Sika deer have been introduced to various states, including Idaho, and are common game animals.
Step-by-step explanation:
The most common game animal in Idaho, as in many other states, includes various species of ungulates that were introduced to the wild.
From historical data, the introduction of small and large game mammals has been widespread worldwide. In the United States, Presnall (1958) reports that at least 10 species of ungulates were introduced, with at least 5 species still having established populations according to Long (2003).
Among these, ungulates such as the wild pig (Sus scrofa), axis deer (Axis axis), fallow deer (Dama dama), red deer (Cervus elaphus), and Sika deer (Cervus nippon) have been the most successful worldwide for sport.
Although the question is about Idaho specifically, these ungulates have been introduced across various states and may also be common in Idaho.