title: The fly can discriminate movement at signal/noise ratios as low as one-eighth.
mesh_terms: D000818:Animals; D006793:Houseflies / Q000502:physiology*; D006801:Humans; D009039:Motion Perception / Q000502:physiology*; D009799:Ocular Physiological Phenomena; D010364:Pattern Recognition, Visual; D010775:Photic Stimulation