other visual cues include the presence of a bull's eye (see Figure 9.15) and special patterns on the petals called nectary guides (see Figure 9.16) direct the insect to the nectar reward. In some orchids, the shape,colouring and even odour of the flower mimic that of the female insect pollinator. In its attempts to copulate with the female, the male insect transfers pollen from one flower to another.