Here is an example of a bee of the family Megachilidae, which includes leaf-cutter bees, Mason bees, and carder bees.
Most of these bees are solitary, and very efficient pollinators. They drink nectar from plants, like most bees. Some are parasites of other bees, consuming nectar collected by other bees. One of the most common member of Megachilidae is the Leaf Cutter bee, seen above. Still haven't found too many specimens of this type.