The fauna of Illinois include a wide variety of mammals, birds, amphibians, reptiles, fish and insects (not listed). * The state bird is the Northern cardinal. * The state insect is the monarch butterfly. * The state animal is the white-tailed deer. * The state fish is the bluegill. * The state fossil is the tully monster. * The state amphibian is the eastern tiger salamander. * The state reptile is the painted turtle.