Rusty patched bumble bees are endangered One year ago, the rusty patched bumble bee was listed as endangered — the first bumble bee to be listed in the Continental United States under the Endangered Species Act (ESA). These bees have lost 87 percent of their population over the last 20 years.1 Among the causes? The widespread use of bee-killing pesticides. Rusty patched bumble bees are […]