Franklin's Bumblebee

Franklin's bumblebee (Bombus franklini) is known to be one of the most narrowly distributed bumblebee species, making it a critically endangered bee of the western United States. It is known only from a 190-by-70-mile (310 by 110 km) area in southern Oregon and northern California, between the Coast and Sierra-Cascade mountain ranges. It was also abundant in southwest Washington. It was last seen in 2006. Franklin's bumblebee is known to collect and nectar pollen from several wildflowers, such as lupine, California poppy, and horsemint, which causes it to be classified as a generalist forager.
== Description ==
Franklin's bumblebee is distinguished from other bumblebees by a solid black abdomen, with yellow anteriorly on the thorax in a U-shaped design. Females have black hair on their faces and the vertices, with some light hairs mixed above and below their antennal bases, while most similar bumblebee species have yellow. Males of this species are similar except their malar spaces are long and wide, the hair on males' faces is yellow, and tergum 6 has some pale hairs laterally.
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