Concrete mite / Sidewalk mite

Typically found on sunny masonry surfaces such as concrete walls, sidewalks, and patios.

They are primarily predatory or scavengers, feeding on small soft-bodied insects, insect eggs, and sometimes pollen.

They are highly active during the spring and early summer in bright sunlight. They run quickly across surfaces looking for food.

They provide ecosystem benefits by preying on smaller pests. While harmless to structures, they can cause a temporary red stain if crushed on surfaces or clothing and may occasionally bite humans, though they do not transmit disease.