Abundance and Diversity of Native Bumble Bees Associated with Agricultural Crops: The Willamette Valley Experience

Table 1

Bumble bee species observed foraging on bloom in commercial blueberry and red clover seed production fields in western Oregon.

Bumble bee species	% of all Bombus foragers^1
	Blueberry bloom^2	Red clover bloom^3
Bombus appositus	1.57	1.74
Bombus californicus	3.92	1.87
Bombus griseocollis	15.69	0.68
Bombus melanopygus	12.55	0.00
Bombus mixtus	8.23	0.31
Bombus nevadensis	5.49	3.17
Bombus vosnesenskii ^4	52.55	92.23

${}_{}{}^1\text{Based}\mathrm{\hspace{0.17em}\hspace{0.17em}}$on visual observations made while walking in the field.
² From [23].
³ From [16].
⁴ A small proportion (2-3%) of these were likely to have been B. caliginosus which is phenotypically very similar to B. vosnesenskii and cannot be accurately separated from it in the field.