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Comparative levels of food source specificity for families of bee in the SWAFR. Analysis is based on the Western Australian Museum database of bees visiting flowers (Houston 2000). Only bee species represented by more than 20 specimens in the Western Australian Museum collection have been included. Number of species: Apidae, 4; Colletidae, 67; Halictidae, 8; Megachilidae, 8 and Stenotritidae, 6. Histograms show mean±standard errors.
