Suckley cuckoo and Western bumble bees — have declined significantly, and the Franklin’s bee is difficult to find, said Kim Delfino, California program director for Defenders of Wildlife.

A survey of California bumblebees could not detect ... in our study is we failed to find Bombus occidentalis, the western bumble bee,” said Hollis Woodard, an entomologist at UCR.

Researchers visited 17 sites throughout the state and ... what was previously one of the most common bumble bee species in California, the western bumble bee. “We didn’t find it even once ...

Several species of bees have gone missing in California ... those sites we also failed to find some species that used to be there.” One of the missing species included the Western bumble ...

(Beyond Pesticides, June 23, 2022) In the first California ... locate more than ten bees at each site. The researchers collected 17 types of bumble bees, representing only 68 percent of bee species ...

riparian areas in the Sierra Nevada and Cascades as well as in coastal grasslands in northern California. The Suckley’s cuckoo bumble bee (Bombus suckleyi) is a nest parasite of the western ...

Bumblebee queens don t work nonstop. UC Riverside scientists discovered that queens take strategic reproductive breaks early ...