If you like to eat blueberries, apples, almonds, and other fruits that require pollination, you can thank a honeybee. Farmers could not grow these crops without the essential service bees provide.

"We depend on honeybees for our existence," says Hail Bennett of Bennett Orchards, in Frankford, Del, which has just opened its fields to u-pick visitors for peak season.

Each spring, just as his blueberry bushes are flowering, Bennett rents loads of bees from a commercial beekeeper. For three weeks, the bees buzz around moving millions of grains of pollen within and between flowers in order to pollinate the plants.