Bombus Across America (image) University of Illinois at Urbana-Champaign Caption Researchers analyzed the relative abundance of eight species of bumble bees in the US. Black areas of the US. map represent the historic range of Bombus affinis, one of the species found to be in decline. Yellow circles indicate the total number of bumble bee specimens collected at a given site. Orange areas in the circles represent the relative proportion of B. affinis specimens found at that location. (Yellow circles with no orange regions indicate no B. affinis specimens were found at that location.) Credit IMAGE by Janet Sinn‑Hanlon of the Imaging Technology Center, Beckman Institute, University of Illinois Usage Restrictions Photo may be used only to accompany articles about the research described in this release. Please credit: IMAGE by Janet Sinn‑Hanlon of the Imaging Technology Center, Beckman Institute, University of Illinois Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.