The seasons are changing from fall to winter, and one of the major changes to the environment is that the deciduous trees have lost their leaves. Evergreen trees may still have green needles, but all ...
Mountain pine beetle-killed trees at Lookout Pass in 2002. Provided by Idaho Dept of Lands. Bark beetles are only about the size of a grain of rice. But for such tiny critters, they can take a big ...
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