This is a checklist of the most common wildlife seen at Horicon Marsh.
Birds are among the most easily observed wildlife.
Over the years, a total of 264 species of birds have been sighted at Horicon Marsh. Horicon marsh consists of 32,000. However, the abundant habitat attracts many non-game species. There are also a number of rare, threatened, and endangered species among them. Bird watching and other wildlife observation are encouraged.