* By population: This would be extremely difficult to determine as wildlife populations fluctuate constantly.
* By geographic distribution: Some animals are found widely across Idaho, while others are more localized.
* By visibility: Some animals are very visible (like deer), while others are more secretive (like bats).
However, some candidates for "most common" animals in Idaho, based on various factors, include:
* Deer: Mule deer and white-tailed deer are widely distributed and often seen in rural and suburban areas.
* Elk: Elk populations are also significant in Idaho, especially in the northern and eastern parts of the state.
* Small mammals: Mice, voles, squirrels, and other small mammals are abundant throughout the state, although they are less visible.
* Birds: A diverse range of birds is present in Idaho, with many species like robins, sparrows, and crows being quite common.
Ultimately, the "most common" animal in Idaho depends on the specific criteria used.