On 16 July 2011, I tagged along with Scott King as he searched for meadowhawk nymphs. Heath Creek, which runs just south of Highway 19, harbored hundreds of Ebony Jewelwings--a species I wrote about last June. Among the Ebony Jewel wings, and closer to the creek surface, hunted River Jewelwings. The males of these large damselflies are easily identified by their black wing tips. The species is common along waterways from the northern United States to southern Canada.
Male River Jewelwings actively court their females. The male flutters back and forth in front of perched females. After mating, the female backs down an aquatic plant until she is about a foot under water. She then lays her eggs on the plant stem. After hatching, the young take up to three years to mature (Idaho State University).