Fauna A small green island in a very urban area, the IIe-Saint-Denis Park is home to a great variety of birds, insects and mammals. This wildlife is drawn by the grassy areas, the woods and plant beds and by the proximity of the Seine. The park wildlife Peacock butterfly Throughout the year, insects, mammals and about fifty species of birds (breeding and winter birds or migratory birds passing through) can be seen in the park. Read more The wildlife of the Seine and its banks Common moorhen © Biotope The Seine is a good place to watch waterfowl. The vegetation growing freely on its banks provides an ideal sanctuary for many other animal species. Read more