desert bighorn sheep mojave california oregon university state respiratory resilience disease showing providence ewe observed ram mountains left crowhurst rachel
bighorn sheep desert genetics canadensis nelsoni ovis abella ewes regina cdfw courtesy
sheep bighorn wildlife herd desert arizona fish refuge animal national depleted survey yuma kofa southwestern finds still shown nevada refuges
sheep bighorn park reef capitol national desert utah britannica website animal central south mowryjournal
bighorn sheep death valley national park underway nps study studies studying desert canyon