Pollinators have the ability to determine specific flowers they wish to pollinate. Bumblebees are also reared commercially to pollinate tomatoes grown in greenhouses. However, pollinators are rather selective in determining the flowers they choose to pollinate. Honeybees pollinate 80% of plants worldwide. In America, hives are commonly transported so that bees can pollinate crops in other areas. Beetles were most likely the first insects to pollinate flowers. Unlike their bee relatives, ants rarely pollinate plants. In flowers, the purple anthocyanins help attract insects who pollinate the flowers. Lepidoptera (butterflies and moths) also pollinate plants to various degrees. This scent attracts insects such as flies which then pollinate the rare plant. Other experiments also indicated that body size is an important factor in how bumblebees pollinate. On the other hand, species of wasps pollinate multiple host fig species. Flowering plants and the animals that pollinate them have co-evolved. But commercially grown kiwifruit is notoriously difficult to pollinate. These plants can pollinate themselves, but the individual flowers are not self-fertile.