Of thirty known bumble bee species in the western U.S., the bombus occidentalis – the western bumble bee - is among the most common. But their numbers are drastically declining.
Over the last two decades, these yellow-and-black furred insects have experienced a 90% drop in abundance across the West. That’s according to research by Jonathan Koch , an entomologist at the U.S. Department of Agriculture in Logan, Utah. His data adds to a growing body of research with the same alarming findings.