What key observation regarding *B. fervidus* coloration is noted in the Montana Field Guide descriptions?
Answer
It is often predominantly yellow on the thorax.
Descriptions from the Montana Field Guide note a specific characteristic observed in that region: the bee being predominantly yellow on the thorax. While the text cautions that coloration can vary widely, leading to the 'yellowish' common name, this specific observation regarding the thorax coloration is mentioned in the context of records from the Mountain West. This feature is useful for cross-referencing, although observers are reminded that color is not a definitive identifier across all populations.
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