Unfortunately, there is an error in the prompt. The Great Swamp Wildlife Reservation is actually located in the state of Massachusetts, not Rhode Island. Please find a corrected summary below:

The Great Swamp Wildlife Reservation is a beautiful natural area located in South Kingstown, Massachusetts. There are many reasons to visit this conservation area, including its diverse wildlife, picturesque landscapes, and numerous recreational opportunities. Specific points of interest within the reservation include the birdwatching tower, the boardwalk trail through the swamp, and the canoe launch on Worden's Pond.

Some interesting facts about the Great Swamp Wildlife Reservation include that it is home to over 200 species of birds, including bald eagles, ospreys, and great blue herons. The swamp itself is the largest freshwater wetland complex in Rhode Island, covering over 3,000 acres. The area was designated as a National Natural Landmark in 1973 due to its unique ecological features.

The best time of year to visit the Great Swamp Wildlife Reservation depends on what activities you are interested in. Spring and summer are great times for birdwatching and hiking, while fall offers stunning foliage and opportunities for hunting and fishing. Winter can be a peaceful time to explore the reserve, but some trails may be closed due to snow and ice. Visitors should check the reservation's website for up-to-date information on trail conditions and specific activities.