There are only two species of Clubtails in Minnesota or Wisconsin that have rings separating most of their abdominal segments, the Eastern Least Clubtail and the Zebra Clubtail. It is easy to distinguish between these two species by size. The Eastern Least Clubtails is one of the smallest Clubtails in the area at around 1.5", while the Zebra Clubtail is much larger, around 2.3"