which faith is majorly practiced here?
Roman Catholics
Illinois
Roman Catholics constitute the single largest religious denomination in Illinois; they are heavily concentrated in and around Chicago, and account for nearly 30% of the state's population. 
what time of year do you see cardinals UNANSWERABLE what is this entity? It is a bird what does it eat? Their diet consists mainly of weed seeds, grains, and fruits. how it related to united states? It is the state bird of seven U.S. states name few of these states? Illinois, Indiana, Kentucky how is the weather of the first? Most of Illinois has a humid continental climate, with hot, humid summers and cold winters. The southern part of the state, from about Carbondale southward, has a humid subtropical climate, with more moderate winters.
wiki:7733661
Illinois [SEP] Christianity
Roman Catholics constitute the single largest religious denomination in Illinois; they are heavily concentrated in and around Chicago, and account for nearly 30% of the state's population. However, taken together "as a group", the various Protestant denominations comprise a greater percentage of the state's population than do Catholics. In 2010 Catholics in Illinois numbered 3,648,907. The largest Protestant denominations were the United Methodist Church with 314,461, and the Southern Baptist Convention, with 283,519 members. Illinois has one of the largest concentrations of Missouri Synod Lutherans in the United States. Illinois played an important role in the early Latter Day Saint movement, with Nauvoo, Illinois, becoming a gathering place for Mormons in the early 1840s.