The region's obvious resources attracted Euro-American settlement, with frontiersmen founding the village of Big Blue Hollow at the southern end of the state park about 1840. The island, and the mainland river banks and bluffs surrounding it, are noted wintering spots of the bald eagle, which eats the Asian carps and bottom-feeding fish that live in the Illinois River.Īrcheological evidence indicates that the Napoleon Hollow area has been used by hunters for over 7,000 years. īig Blue Island is wooded with wetland trees such as the cottonwood, silver maple, and willow. Arborists took core samples from two white oak trees in 2001, and found that one tree was 378 years old and the other one 322 years old. Whitetail deer and a wide variety of small mammals thrive on the acorn mast generated by the oak/hickory forest. It centers on Napoleon Hollow, a steep-sided ravine cut into the limestone bluff, that discharges rainwater from the forest down into the Illinois River. The mainland section of the Ray Norbut State Fish and Wildlife Area is made up of Illinois River bluffland oak and hickory temperate hardwood forest.
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