Megachile policaris, commonly known as the leafcutter bee, is a species of solitary bee belonging to the family Megachilidae. These bees are known for their distinctive behavior of cutting circular pieces of leaves to construct their nests. They are medium-sized insects, with a robust body and a dark metallic blue or green coloration. Megachile policaris is an important pollinator, playing a crucial role in the reproduction of various flowering plants.