About the Cover
Cover legend: Dragonflies have two multifaceted compound eyes and three simple lens eyes known as ocelli. In this picture, a dragonfly views a panoramic ultraviolet and green display specifically designed to stimulate the large neurons in the retina of its median (middle) ocellus. Intracellular potential recordings of these cells reveal that they are directionally selective to movements of ultraviolet bars and gratings but become wide-field sensors, insensitive to direction, when only green light is present. For more information, see the article by van Kleef et al. in this issue (pages 2845–2855).
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