anting
n.— «The behavior you witnessed, Mona, is called “anting.” I know it seems like it should be called “mothballing,” but anting is much easier to say. Plus, more often than not, birds rub their feathers with ants.…Over 250 different species of birds have been observed rubbing live ants over their feathers.… Birds have also been known to use over 40 other items to rub over their feathers. The list includes beetles, millipedes, lemons, walnuts, cigarette butts, and in some fashionable cities, Old Spice.» —“The anting antics of grackles” Cape Codder (Massachusetts) Aug. 11, 2006. (source: Double-Tongued Dictionary)