What is the primary description for the coloration of the Yellowish Cuckoo Bumblebee's thorax segment?
Answer
Bright yellow
The common name itself points toward the general hue, which is typically described as yellowish or orangish-yellow overall. Specifically regarding the body segments, the thorax—the middle section where the wings and legs attach—is consistently noted in observations to present as bright yellow. While the abdomen's black patterning is highly variable, the bright yellow color of the thorax tends to be a more stable characteristic of the species, although it should not be used in isolation for identification due to the potential for convergent evolution with non-parasitic species.
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