Colorado’s warm and dry winters have tipped the balance in a long-running ecological tug-of-war. The mountain pine beetles, native insects to the Centennial State, have recently exploded in numbers in ...

Add Yahoo as a preferred source to see more of our stories on Google. A western pine beetle rests on a sap mound on a pine tree. - Charles Wollertz/Getty Images A thriving pine tree is a thing of ...

Don Hardin’s hillside was largely cleared of trees killed by the mountain pine beetle in April with help from his neighbors but now, in early July, an overwhelming number stand dead. Some of the trees ...

Many of the once-green pine trees along roadways in Suffolk County have turned yellow and orange, evidence that they are dying. They're victims of the southern pine beetle, an invasive insect no ...