A worker caste common eastern bumble bee (Bombus impatiens) collects nectar containing iridoid glycoside secondary metabolites from a turtlehead (Chelone glabra) flower.
A bumble bee collecting nectar containing iridoid glycoside secondary metabolites from a turtlehead (Chelone glabra) flower. The photo depicts Bombus vagans, a co-occurring congener of the focal bumble bee Bombus impatiens.