Fig. 6. Streamlines around a fruit fly at early supination and pronation. Streamlines around a hovering fruit fly at early supination (A) and at early pronation (B). A color map represents pressure contours on the wing and body surfaces: red is high and blue is low; streamlines are released at the leading edge from the wing surfaces, color of streamlines indicates the absolute flow speed. LEV, leading-edge vortex; TV, wing tip vortex; SV, stopping vortex (for further explanation, see text).