Many years ago about about 6-8 Choisya ternata (Mexican Orange Blossom) were planted for the Citrus butterflies, every year the caterpillars feed on them so the shrubs. The strange thing there is large lemon shrub adjacent to the Choisyas btu they caterpillars never feed on it. The lovely butterflies only live for a day and die after mating! They dart around so quickly that they are never still enough to photo graph.