Courtship-vibration
Guides
Philodromus rufus vibrans
Philodromus rufus vibrans is a subspecies of running crab spider in the family Philodromidae. It occurs in North America and is distinguished from the nominate subspecies by its small size, heavily speckled appearance, and distinctive male courtship behavior involving leg vibration. Males possess an angular retrolateral apophysis on the palpal tibia. The subspecies inhabits diverse terrestrial environments across the United States and Canada.