There exist solitary bees that are native to most regions of the world. In this classification of bees, there is no queen bee, and therefore every female is fertile. There are no worker bees for these species, as essentially laying females act as both a worker and queen in and of her self. Solitary bees typically don’t produce honey or beeswax on a harvestable scale.
Solitary bees are especially important as pollinators as many feral social bees are in danger, due to dwindling numbers and parasites.