Figure S1. Orientation to a Manipulated View of the Milky Way from How animals follow the stars

(a.) Schematic showing an experiment in which 10 nocturnal dungbeetles (S.satyrus) were presented with an uninterrupted- (left) or partly-obscured (middle–right) view of the Milky Way (dark blue) and Milky Way ‘bright spot’ (light blue). (b.) Beetles viewed the Milky Way between 01:30–03:00 (02:15 shown), when the bright–spot appeared at ≈30° elevation SSE (left). Black fabric screens that obscured a region 0–45° in elevation across ≈50° of azimuth were raised either at the bright spot (middle), or both at and opposite to the bright spot (right). (c.) Change in heading angle between successive trials: when beetles were transferred to a new arena with a camcorder overhead (left), between an unobscured view and a bright-spot-obscured view (middle) and between unobscured and low-elevations obscured (right). Beetles remained well oriented, suggesting that stellar cues were sufficient in each case; but an increase in spread (right) may have resulted from the reduction in contrast between the southern and northern