title: Shimbiraha gobolka ee Pa oo halis ugu jira inay ka baxaan gobolka sababo la xiriira isbedelka cimilada
abstract: Ruffed Grouse, oo ah shimbirta gobolka Pennsylvania tan iyo 1931, waxay halis ugu jirtaa inay ka baxdo gobolka Keystone sababo la xiriira isbeddelka cimilada.