Because they look like bugs, people just assume they are. In fact, the clover mite is an arachnid, closely related to spiders and ticks. Spider mites. While these could be the tiny red bugs on concrete you have seen, they tend to stick to plants and trees but have been know to crawl on asphalt or concrete.
Then, can clover mites bite humans?
Though they do not bite or cause health-related problems, clover mites can be a nuisance. If smashed when they crawl over carpets and drapery, the mites leave a red stain. Clover mites can be red, green or brown, and have front legs that are about twice as long as their other legs.
What do clover mites feed on?
Clover mites feed by sucking sap from various plants. They feed on clover, lawn and other grasses, various trees, ornamental plants and shrubs, but do not cause much damage. High numbers are often associated with maintained and well-fertilized lawns.