Which weasel species favors open, grassy expanses like grasslands and hay fields in Illinois?

Answer

The least weasel (*Mustela nivalis*)

The least weasel (*Mustela nivalis*) occupies a distinct ecological niche within areas like Illinois compared to its larger relative. While the long-tailed weasel may prefer denser environments such as woodlands or brushy edges, the least weasel demonstrates a strong preference for more open terrain. Specifically, it is identified as inhabiting grasslands, hay fields, and locales characterized by low, dense vegetation. This difference in landscape structure preference means that habitat assessment for weasels in areas like central Illinois must account for the specific species present, as one species seeks out open expanses while the other seeks dense concealment.

Which weasel species favors open, grassy expanses like grasslands and hay fields in Illinois?

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