Whirligig Beetle
Scientific Name: Dineutus discolor
Order & Family: Coleoptera: Gyrinidae
Size: 10 to 15 mm

Natural Habitat
Freshwater ponds, lakes, and slow-moving streams, often found on the surface or near the water's edge
Diet & Feeding
Mainly eats small insects and other invertebrates that fall onto the water's surface; can also scavenge on dead material
Behavior Patterns
Known for their rapid, circular swimming movements on the water surface and can dive underwater when threatened. They often form large groups and have divided eyes for seeing both above and below the water simultaneously.
Risks & Benefits
Beneficial to ecosystems as they help control insect populations and serve as a food source for fish and other wildlife; they are generally harmless to humans but may produce a defensive, foul-smelling secretion if handled.
Identified on: 5/15/2026