• Photo of early morning clouds hanging low in the valley with mountains of the Continental Divide stretched out above. NPS Photo/Schonlau

    Rocky Mountain

    National Park Colorado

Forest Health: Science Videos

 
a photo of a tree damaged by mountain pine beetle

The Mountain Pine Beetle
Why are there so many brown trees? The Mountain Pine Beetle is one of several common, native insects that challenge western pine forests. Drought conditions, mild winters, dwarf mistletoe infestations, dense late seral mature forest stands, and a lack of wildland fires have contributed to the outbreak. The scale of the current beetle epidemic is unprecedented in historic times, with millions of acres of trees being affected throughout the West from Mexico to British Columbia.

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