Harvest mites (genus Trombicula; also known as red bugs, trombiculid mites, scrub-itch mites, berry bugs or, in their larval stage, as chiggers) are mites in the family Trombiculidae that live in forests and grasslands. In their larval stage they attach to various animals including humans and feed on skin, often causing itching. These relatives of spiders are nearly microscopic measuring 0.4 mm (1/100 of an inch) and have a chrome-orange hue. A common species of Harvest mite in Northern America is Trombicula alfreddugesi; in the UK the most prevalent Harvest mite is Trombicula autumnalis.