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  • Large-scale study reveals major decline in bumble bees in the U.S.

    Researchers analyzed the relative abundance of eight species of bumble bees in the U.S. Black areas of the U.S. map represent the historic range of Bombus affinis, one of the species found to be in decline. Yellow circles indicate the number of total 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. (Empty yellow circles with no orange regions indicate no B. affinis specimens were found at that location.)

    Researchers analyzed the relative abundance of eight species of bumble bees in the U.S. Black areas of the U.S. map represent the historic range of Bombus affinis, one of the species found to be in decline. Yellow circles indicate the number of total 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. (Empty yellow circles with no orange regions indicate no B. affinis specimens were found at that location.)

    Graphic by Janet Sinn-Hanlon of the Imaging Technology Center, Beckman Institute

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      Researchers analyzed the relative abundance of eight species of bumble bees in the U.S. Black areas of the U.S. map represent the historic range of Bombus affinis, one of the species found to be in decline. Yellow circles indicate the number of total 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. (Empty yellow circles with no orange regions indicate no B. affinis specimens were found at that location.)

      Graphic by Janet Sinn-Hanlon of the Imaging Technology Center, Beckman Institute

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      University of Illinois entomology professor Sydney Cameron and her colleagues analyzed bumble bee populations across the U.S. Their study found dramatic declines in four of eight species studied.

      Photo courtesy Sydney Cameron

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