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Rare sheep are US.-Mexico border crossers, but they're hitting a sharp new obstacle

On a dirt road in Imperial County leading toward the Mexico border, the tracks of rare wild sheep press into dusty tire tracks, amid jumbled boulders and spindly ocotillo. The white trucks and SUVs of ...
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Rare sheep are U.S.-Mexico border crossers, but they're hitting a sharp new obstacle

Endangered Peninsular bighorn sheep roam the hills of Skull Valley, where razor wire has been laid down along the US-Mexico border in the Jacumba Wilderness. On a dirt road in Imperial County leading ...