[Wikipedia] Carnivory: Drosera capture insects by luring them with their glossy, magenta-hued beads of false "nectar" (seen covering the tentacles of healthy leaves); this nectar is, of course, merely sticky droplets made-up of digestive enzymes. The secretions act as a visual attractant to nearby insects, as it shines in the sun (hence the common name of sundew). Furthermore, when Drosera plants come into bloom, the flowers themselves bring more potential prey to the vicinity of the plant. (link added by Mary Ann Machi)