Every spring, people notice the presence of little red bugs walking quickly on pavement, sidewalks, stones, or masonry floor in patios or outdoor walls. These are not insects, but mites and are ...

It's unclear why concrete mites appear in large numbers in sunny locations in spring. But the gatherings are short lived and subside quickly. Because of their habit of leaving red marks, ...

Running on concrete, these sesame seed-sized mites traveled at an average speed of 192.4 body lengths per second, a measure of speed relative to size. Their peak speed was 322 body lengths per second.