Clover mites are attracted to warmth and sunlight. That is why they often gather on south-facing or west-facing windows where the sun hits the strongest.
Homes surrounded by grass, plants, or thick vegetation are especially attractive to them because they feed on plant juices outdoors.
Are They Dangerous?
The good news is that clover mites are harmless.
They do not bite humans or pets, spread diseases, or damage furniture or clothing. Their main problem is simply their large numbers and the stains they leave behind if crushed.
Why They Leave Red Stains
The red smear left behind is not blood. It comes from natural pigments inside the mites’ bodies.
Although the stains are not dangerous, they can be difficult to clean from walls, curtains, carpets, and windowsills.