The bees perform pollination during the collection of pollen and nectar.
In their visit to the flowers, the bees are abundantly covered with pollen and transported in successive visits to the stigmas of other flowers.
An important feature of bees’ activity is their floral constancy: when bees begin their activity on a particular species, they continue to visit their flowers until they are exhausted, before switching to another species.
The preference of bees for the flowers of some species, which is linked to the concentration of sugars of the nectar. In their collection they follow the “law of minimum effort”. For example, bees prefer cherry blossoms, with more than 50% nectar sugar, to pear trees with only 15%.