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There are nearly 20,000 known species of bees in seven recognized biological families.[1]

References

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  1. ^ Danforth BN, Sipes S, Fang J, Brady SG (October 2006). "The history of early bee diversification based on five genes plus morphology". Proc. Natl. Acad. Sci. U.S.A. 103 (41): 15118–23. doi:10.1073/pnas.0604033103. PMC 1586180. PMID 17015826.