To attract animals, flowers have bright colors and often produce nectar Transferring pollen from an anther to a stigma is called pollination. In many cases animals do this. Flowers are pollinated by several kinds of animal, but the chief pollinators are insects that are attracted to the flowers by their colors and scents. To guide insects towards the nectar often there are lines and markings on the petals. Usually blue, yellow, pink or white are insect-pollinated flowers. However, the colors we see are not the same those insects see. Red appear grey to a bee, for example. Ultraviolet light can be detected by a bee. So a white or yellow flower probably looks blue to a bee.