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Sanders, Democratic stars make pitch for Clinton after messy first day

ptarmigan

August 29, 2012
Black rosy finches are one of three rosy finch species nesting above timberline in North America. Here a juvenile (left) begs from an adult on the Beartooth Plateau in Wyoming. Photos by Keith Corliss
Persistence produces two alpine bird species
August 29, 2012 - 12:00am