Description: English: Trichopoda plumipes - Meadowwood Farm SRMA, Mason Neck, Virginia. The feathers on the hind legs are rather pretty. These flies parasitize stink bugs, so are a very useful fly to have around. Date: 21 September 2012, 16:45:29. Source: https://www.flickr.com/photos/52450054@N04/8012040914/. Author: Judy Gallagher.