Rafting-behavior
Guides
Dineutus assimilis
Dineutus assimilis is a species of whirligig beetle in the family Gyrinidae, native to North America. Like other members of the genus Dineutus, it inhabits the surface of freshwater bodies where it exhibits characteristic rapid, erratic swimming behavior. The species is distinguished from congeners primarily by ventral coloration and leg pigmentation. It is part of a diverse genus of surface-dwelling aquatic beetles known for their gregarious "rafting" behavior and chemical defenses.