Union County State Fish & Wildlife Area encompasses 6,202 acres in the Lower Mississippi River bottomlands division of Illinois. Numerous shallow sloughs and other water areas totaling approximately 1,100 acres are scattered throughout the area. More prominent water areas include Grassy Lake with 350 acres and Lyerla Lake with 275 acres. Of the 5,350-acre land area, approximately 2,400 acres are cultivated. The remaining acreage is timber, brush or permanent grass cover. By far the most intensive activity on the area is farming. Each year a variety of hard grain and green forage crops are planted and left standing to provide food for wintering geese. More than 2,400 acres of corn, sunflower, wheat, clover and other crops are established for this purpose. Union County State Fish & Wildlife Area is a haven for many diverse forms of wildlife. The most prominent throughout five months of the year is the phenomenal flock of Canada geese and other waterfowl which winter on the area. White-tailed deer, bald and golden eagles, and many other interesting types of wildlife are commonly observed by visitors to the area. Public use of interior gravel roads is restricted except when permission is granted for special circumstances such as student research and site tours.