Whirligig Beetle

Scientific Name: Gyrinus spp.

Order & Family: Order: Coleoptera; Family: Gyrinidae

Size: 3 mm to 18 mm (approximately 1/8 to 3/4 inch) depending on the species.

Whirligig Beetle

Natural Habitat

Found on the surface of calm or slow-moving freshwater bodies such as ponds, lakes, and stream edges.

Diet & Feeding

Opportunistic scavengers and predators that feed on smaller insects, aquatic larvae, or terrestrial insects that fall onto the water's surface.

Behavior Patterns

Notable for their rapid, circular swimming motions when disturbed. They possess 'split eyes' that allow them to see above and below the water simultaneously. They often congregate in large groups.

Risks & Benefits

Harmless to humans; they benefit the ecosystem by controlling insect populations and serving as a food source for fish and waterfowl.

Identified on: 5/22/2026