“…Birds also anoint themselves with a bizarre list of other items, including millipedes [187,188], caterpillars [189], garlic snails [190], bombardier beetles [191], citrus fruits [192,193,194], walnut juice [195], flowers [196,197], lawn chemicals [198] and even mothballs placed in gardens to repel vegetarian pests [199][200][201]. Many of these items reportedly have anti-parasite properties [201], but few careful tests have been carried out.…”