Beekeepers who rely on them to cross pollinate are interested in the approximately 20,000 species of bees that exist around the world. When bees cross pollinate, it changes not only the flowers they collect pollen from, but it also changes the consistency of the honey they produce. Beekeepers also track bees when they cross breed with different species of bees, which allows them to track their activities from mating to origin. Beekeepers will also keep track of their honey production, as different types of bees create honey with different consistency.