From the video's description: These whirligig beetles (family: Gyrinidae) were forming aggregations -- and appeared to be mating -- on Dry Lagoon in Humboldt County, California on January 14, 2011. The air temperature has been in the 50's and low 60's F for a couple of days, and these beetles were not visible at this location last week with the temperatures in the 30's and 40's. I'm not sure what their behaviors are, but it looked like some individuals spun in a tight circle and another would pounce on it from underwater. Anyway, they were very interesting to observe.
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