Natural History
Before the Rock River country was settled, which includes the area surrounding Stillman Creek, 35% of the land was covered with prairie; as of 2000 there were 48 acres (190,000 m2) of pre-settlement prairie remaining within the Rock River basin. The land surrounding the Rock River and its tributaries is home to a wide variety of plant and animal species. Found throughout the Rock River country 122 species of native birds, 33 species of reptiles, 78 species of mammals, 33 species of native mussel and 10 species of native crustaceans. Of the 950 plant taxa found in the river country, 27 are ferns species. In total, 56 species of Illinois endangered or threatened species make their habitat within Rock River country.
Read more about this topic: Stillman Creek (Illinois)
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