Pollen is one of two different resources which bees require for survival. The pollen is the raw protein source which bees need to build new baby bees. In early spring pollen begins to come into the hive at an astonishing rate. The bees spent the entire winter surviving inside the hive living off of the nectar stores. Now that spring has arrived the bees despretly need more nectar and pollen to start the colony baby bee production back up.