Eastern massasauga rattlesnakes
Adults of the species Sistrurus catenatus, often known as the eastern massasauga, generally grow to a length of between 18 and 30 inches. Rattlesnakes are classified as either small or medium in size. Some individuals of the eastern massasauga have brown spots on a grey background, while others are almost totally black in color. These differences in appearance are indicative of the species' variable overall appearance. It is the only species of snake found in Indiana that has a rattle attached to the tip of its tail, which sets it apart from all other snakes in the state (although juvenile specimens may have a very small, undeveloped rattle which may be difficult to see).
It is typical for eastern massasaugas to live in wetland environments, however they may also be found in drier settings. It has been discovered that they inhabit marshy grasslands, the shores of lakes, fens, dry prairies and woodlands, and swampy grasslands that are wooded.