Only a quick point, in Saskatchewan there were breeding programs for the alfalfa leafcutter bee, which led to some changes in the nature of the bees that were commercially available and improved the industry.
There's a certain amount of selection and geographic separation, particularly between the northern stocks of leafcutter bees and the southern stocks. The southern stocks tend to have more diseases than the northern stocks. By the sort of shake-hand agreement among the producers, they tend not to shift their bees around too much because of the selection, the advantages of one particular biotype in one part of Saskatchewan versus another part of Saskatchewan.
I think that's a good example of a wild bee that has been taken into domestication and is used practically and has been selected and bred for particular beneficial characteristics.