Trombiculidae, also called harvest mites or red bugs, are the larvae of acarid parasites, bright red in color, and measuring around 0.2 mm. A trombiculid mite attaches itself to the skin of its host, thanks to its mouth hooks, called chelicerae. It then stays on its host and feeds on liquids present in its tissues during a period of 2 to 10 days. Trombiculidae are found on animals, the ground and in grass, particularly in warm climates. A trombiculid sting can cause a strong desire to itch.