As spring arrives, you may spot bees busily buzzing from flower to flower. They’re sipping a sweet liquid called nectar. But they’re doing something else too—helping plants reproduce.
Bees are pollinators. When a bee lands on a flower, tiny grains called pollen stick to its body. Pollen contains the plant’s reproductive material. The bee transfers the pollen to the next flower it visits, causing the flower to produce seeds (see Pollinating Plants).
Most fruits and vegetables with seeds need pollinators, says Kelsey Graham. She’s an ecologist at Michigan State University. Many other insects, like butterflies, also pollinate plants. But bees are among the most effective pollinators. Some farmers even pay beekeepers to deliver bees to their crops.