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Whirligig Beetles Active

Congratulations to Stein Feick, the first person to correctly identify the Mystery Photo as a Whirligig Beetle!  You usually see this aquatic beetle swimming around and around in circles on the surface of a pond searching for prey. A unique feature of most beetles in this genus is their divided eyes.  Each eye is completely separated into two portions (see photo). One portion (dorsal) is above the water line and the other (ventral) is beneath the water on each side of their head, allowing them to see both in the air/on the surface of the water as well as under the water.  The dorsal eyes have a limited field of view, so these beetles rest one of their antennae on the surface of the water to help them detect any motion caused by prey.

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2 responses

  1. Fascinating! I have a question–yesterday a female mallard flew through our front yard and landed on top of a telephone pole where she sat for awhile. The male flew over then, and she went off with him. Several years ago, some friends had a female mallard in their chimney (A happy ending– after a long day the duck was freed!), and another friend once woke to a thumping noise and went out fo find a duck on her roof. Do you know what that’s all about?

    April 29, 2020 at 7:12 am

  2. Bill on the Hill

    That is quite the mustache… :~)

    May 5, 2020 at 7:06 am

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