Flexi Says: Flowers are the reproductive structures of angiosperms. Flowers in angiosperms attract pollinators such as birds and butterflies that are responsible for flowering plant survival. Flowering plants can reproduce two different ways: Self-pollination: Pollen falls on the stigma of the same flower. This way, a seed will be produced that can turn into a genetically identical plant. Cross-fertilization: Pollen from one flower travels to a stigma of a flower on another plant. Pollen travels from flower to flower by wind or by animals. Flowers that are pollinated by animals such as birds, butterflies, or bees are often colorful and provide nectar, a sugary reward, for their animal pollinators.