Abundance and Diversity of Native Bumble Bees Associated with Agricultural Crops: The Willamette Valley Experience
Figure 2
Comparison of the numbers of queens and workers of bumble bee species (excluding B. vosnesenskii which is included in Figure 3) observed foraging on bloom. (a) Blueberries (n = 127 counts). (b) Red Clover (n = 187 counts).
