Beetles in Horses water

Asked May 2, 2016, 9:17 PM EDT

These showed up in the horses water. There are about 25 since yesterday. They are about 1/4 inch long. What might they be and are they something we should be treating?

Linn County Oregon

1 Response

There are a number of families of so called "water beetles" that look similar (see They are harmless and may be living in the tanks especially if there is adequate vegetation. No treatment is needed. If you want an exact species determination take a few to the Linn Co. Extension office and they will send them to OSU for id.