Whether you're strolling through a garden, wandering a park, or simply enjoying an open space in the United States, you're likely to notice bees buzzing about the flowers. While honeybees, imported from Europe in the 17th century to produce honey, are the most recognizable, they aren't the only bees at work. If you're a keen observer, you might spot some of the thousands of less familiar, native bee species that call these spaces home.