Andalusia Slough is a stream located in Rock Island County, Illinois, serving as a backwater channel of the Mississippi River system. This scenic waterway provides access to diverse aquatic habitats including island environments suitable for marsh species, creating excellent opportunities for both fishing and wildlife observation. The slough features a unique ecosystem that supports various fish species and serves as important habitat for migratory waterfowl, turtles, frogs, and shoreline birds. Bald eagles can frequently be observed along the waterway during open water periods in winter and spring, adding to the area's natural appeal.