It is to a plant’s advantage to be visually attractive to a specific pollinator so that those animals will seek out and concentrate on that particular plant during their search for nectar. This keeps pollen from being spread to other plant species, where pollination won’t take place. Flowers appeal to their pollinators’ sensory systems by using signals such as alluring odours or colours. Flowers pollinated by nocturnal animals like bats and moths, which rely more on hearing than smell and sight, usually have dull colours but powerful scents. Flowers pollinated by daytime animals like birds and bees, however, rely on a range of colours. Birds see a spectrum somewhat similar to ours but are especially receptive to red, so blossoms pollinated by them tend to be red or orange. Bees, on the other hand, see a different spectrum composed of yellow, blue, green, and ultraviolet. Flowers pollinated by bees, hence, tend to be in those colours and usually have special markings that are visible only in ultraviolet. Like runway lights, these markings guide insects to the right place to land and find nectar, and in the process, pollinate the plant.