Rocky-streams
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Paltothemis
Rock Skimmers
Paltothemis is a genus of skimmer dragonflies in the family Libellulidae, established by Karsch in 1890. The genus contains at least three described species, commonly known as Rock Skimmers. The best-known species, Paltothemis lineatipes (Red Rock Skimmer), has been studied for its variable mating system, which shifts between territorial defense and alternative strategies depending on male population density. Members of this genus are associated with rocky stream habitats in western North America.