whirligig beetlewhirligig beetle
any of a small family (Gyrinidae) of bluish-black gregarious beetles found darting about in circles on the surface of ponds, streams, etc.
Any of various beetles of the family Gyrinidae that circle about rapidly on the surface of water and have divided eyes, with one pair above and one below the water surface.
(plural whirligig beetles)
- Any of various water beetles of the family Gyrinidae that swim rapidly in circles when alarmed.