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Cover picture: A honeybee worker (Apis mellifera) hovers near a flowering Texas bluebonnet (Lupinus texensis). The honeybee has a highly developed trichromatic visual system and has been shown to use color discrimination while foraging on flowers and homing to the hive. The bee compound eye is composed of three types of photoreceptor cells that are maximally sensitive to UV, blue, and green light. The article by Townson et al., in this issue (pages 2412-2422), describes the identification of two of the visual pigments that mediate color vision in honeybees. Photograph by Wen-Hai Chou.