whirligig beetle
US /ˈwɜːrlɪɡɪɡ ˌbiːtl/
UK /ˈwɜːrlɪɡɪɡ ˌbiːtl/
1.
a type of beetle that typically lives on the surface of water, often swimming rapidly in circles
:
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The pond was full of tiny whirligig beetles, darting and spinning.
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A whirligig beetle can see both above and below the water simultaneously.