The pollen can belong to the original plant or may come from another sunflower. Self-pollination is a mechanism that this flower uses to stay alive. … Seeds created by self-pollination will only produce flowers that look like the original plant, so no hybridization will have occurred.
Butterflies are less efficient than bees at moving pollen between plants. Highly perched on their long thin legs, they do not pick up much pollen on their bodies and lack specialized structures for collecting it. However, they create a marvelous color combination of nature on this sunflower!
Beauties of Nature
The showy outer ray petals help attract the pollinators. Bees go from flower to flower within the disc, becoming covered with pollen. They then pollinate other sunflowers as they go from plant to plant. The success of sunflower as a crop for seeds and oil depends totally on bees.