Flies remain dusty in a dust removal assay, despite near normal leg sweeping and leg rubbing. Grooming behaviour shows similar kinetics to wild type, though the flies are not clean when they stop grooming. Flies walk on a flat surface and can fly. Completely unresponsive in a single bristle scratch reflex test involving the anterior and posterior scutellar bristles and the anterior postalar, but normally responsive to stimulation of multiple microchaetae on the notum.