Bombus mckayi

Ashmead, 1902

McKay's Western Bumble Bee

Bombus mckayi is a North American originally described as a of Bombus occidentalis. It is now recognized as a distinct species within the subgenus Bombus sensu stricto. The species occurs in western North America, though detailed ecological information remains limited compared to better-studied .

Bombus mckayi by (c) Syd Cannings, some rights reserved (CC BY), uploaded by Syd Cannings. Used under a CC-BY license.

Bombus mckayi by the Smithsonian. Used under a CC0 license.

Pronunciation

How to pronounce Bombus mckayi: //ˈbɒmbəs məkˈkeɪ.i//

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Identification

Historically treated as a of Bombus occidentalis; separation based on morphological and genetic differences. Diagnostic features distinguishing it from B. occidentalis sensu stricto include subtle color pattern and morphological variations, though field identification requires expert examination. , , and males show the typical robust, densely hairy body form characteristic of the .

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Distribution

Western North America. Records indicate presence across parts of the western United States and adjacent Canada, though precise range boundaries remain incompletely documented. GBIF records confirm North American distribution.

Ecological Role

As a , expected to function as a of flowering plants, including wildflowers and potentially agricultural crops. Like other Bombus species, capable of buzz pollination (sonication) to extract pollen from poricidal anthers. Specific plant associations have not been systematically documented.

Similar Taxa

Bombus occidentalisFormerly treated as ; B. mckayi was described as B. occidentalis mckayi before elevation to status. Both share western North American distribution and similar general .

More Details

Taxonomic History

Originally described by Ashmead in 1902 as Bombus occidentalis mckayi, later elevated to full status. The taxonomic revision reflects accumulating evidence of distinct evolutionary lineages within the historically broad concept of B. occidentalis.

Conservation Status

Conservation status has not been independently assessed; historical confusion with B. occidentalis complicates trend analysis. The broader B. occidentalis has experienced documented declines in parts of its range.