The Alfalfa Leafcutter Bee, like the honey bee, is not native to Canada. It was probably introduced from Europe in the 1940s, arriving in wood or a similar material which had nesting holes. It was later noted that this species was an exceptional pollinator of alfalfa, and through research, this species was developed as a commercial pollinator, second only to the honey bee in its value. Unlike the honey bee, Alfalfa Leafcutter Bees are solitary, with no workers. However, 1000s will nest together in the same location, provided that enough nesting sites are provided. This species now occurs throughout southern Canada.