Bees are members of the insect order Hymenoptera (including sawflies, wasps, bees and ants) whose habits of feeding on plant pollen and nectar have made them important pollinators of flowering plants and crops. There are more than 20,000 species worldwide, and nearly 800 can be found in Canada. Bees’ nesting habits range from solitary to highly eusocial. Most bees are solitary, wild species, but some are kept or managed for pollination of crops or to produce honey, including the non-native western honey bee (Apis mellifera). Other familiar bees include bumble bees (genus Bombus), mason bees (genus Osmia) and leafcutter bees (genus Megachile). More than a third of all bee species found in Canada are either mining bees in the genus Andrena, or sweat bees in the genus Lasioglossum.