They make what is called "bee bread", which is a mixture of pollen, honey and lactic acid bacteria, which ferment the pollen they have collected from flowers. Pollen is a protein-rich food for the hive. Bees can collect and store pollen on their legs, which have bristles like brushes and combs. They move the pollen that sticks to their bodies to their hind legs, where they have special baskets called corbiculae. The bee crushes the pollen into a ball, along with some nectar and saliva. Back in the hive, they prepare "bee bread." They place the pollen in a cell and let it marinate with a little honey. The bees use the "bee bread" mainly for the growth of their brood.