A QUICK LOOK

The 12-spotted skimmer dragonfly checks out movement to its right while taking a break on an old plant shaft. This species of dragonfly is common to the 48 contiguous state and are most active in July and August and are territorial, often aggressive toward other male dragonflies, according to the Montana Field Guide. They are two to two and a half inches long with a wing span of just over two inches. The eat smaller flying insects.