Eter Schroeder
In this photo provided by Xerces Society, a bumblebee flies by a flower in this undated photo. The Xerces Society for Invertebrate Conservation and University of California at Davis entomologist Robbin Thorp on Wednesday formally petitioned the U.S. Fish and Wildlife Service to protect Franklin's bumblebee under the Endangered Species Act. Scott Black of the Xerces Society says the petition is part of an effort to reverse the decline of bumblebees and other native bees nationwide. Bees pollinate about 15 percent of all crops grown in the nation, worth $3 billion. (AP Photo/Xerces Society, Eter Schroeder) NO SALES
