While crawling around the blossom looking for nectar, the pollinator rubs against the pollen, which becomes attached to different parts of the pollinator's body. When the pollinator visits another blossom, it transfers the pollen grains from its body onto a strategically placed stigma. After it reaches the stigma, the pollen grain grows a tiny pollen tube down the style and into an egg-filled ovary. Eventually, the pollen and the egg form a seed. In North America, most of the pollinators are insects like bees, butterflies and beetles, or vertebrates like hummingbirds and bats.
Honeybees have tiny baskets on their legs for carrying pollen back to the hive.
When butterflies use their long proboscis, or nectar-gathering appendage, to sip nectar from tubular flowers, they get peppered involuntarily with pollen on the proboscis or the head. Plants use various techniques to attract their particular animal partners. Flowers are actually cleverly designed reproductive organs that incorporate all kinds of lures. Another type of lure is aroma. A flower's scent must appeal to its pollinator.