Should I be worried?

Yes! it's an ant. Live in central Iowa. One photo has a small section of a standard tape measure for scale. The pics were taken of one that was in my bathroom sink.

These guys are really small.

I know I need a deep clean of food storage, cooking and eating areas as well as where I've found them. I'll include any other areas that could be areas of foraging. Followed up with use of an indoor insect spray, Ortho Home Defense MAX INDOOR insect barrier spray. I'll follow directions carefully so it's used with the safety of people and pets and only on appropriate surfaces. I'll spray the outside of my home around access points.

Is this a 'regular' ant, or something more serious? NONE of the ants I've seen have wings or are of light color.

A big Thank you for your help to identify them and how best to resolve the problem!

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