Douglas fir trees that survived the recent Frye Fire in the Pinaleño Mountains near Safford are prime habitat for endangered Mount Graham red squirrels — but those trees are threatened by tree-killing ...
A scientist helps save Crater Lake’s whitebark pine trees from an invasive fungus. In 2002, “Oregon Field Guide” told the story of how an invasive fungus called blister rust was killing Crater Lake's ...
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