Haltera The reduced, club-like remnants of the hindwings in the order Diptera. They probably function as stabilizers or as airspeed detectors. WEbsite https://www.google.co.il/search?q=halteres+diptera&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwiI6LTuhOzSAhUCvxQKHWa1BtoQsAQIJQ&biw=1280&bih=686#spf=1
