Video recording and presentation of a smoke plume.

<p>(<b>A</b>) Single video frame showing <i>Merimna</i> flying in zero position. White dots (Tipp-Ex) on the pronotum and on the tip of the right elytra served as position markers for the video tracking software. In the upper right corner of the image the LEDs are visible; flashing of an LED indicated the onset of a stimulus. Inset shows position of the IR organs on the abdomen (arrows, bar: 0.5 mm) (<b>B</b>) Slide showing a smoke plume above the edge of a forest. The slide could be projected on the projections screens of the setup. The same scenery without a smoke plume could also be projected.</p>