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.

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