Can animals share the same space peacefully high above the ground in the treetops? A research team at the University of ...

The amount of forest with problems is only a small fraction of the overall 22 million acres state officials looked at, but it ...

Surveyors mapped approximately 545,000 acres across Washington with some level of tree mortality, tree defoliation, or foliar ...

From the mountain maples in North Carolina to the stunning Spruce-fir trees that shade the Great Smoky Mountains, there’s nothing better than witnessing this fall foliage up close.

Annual cold snaps have kept some invasive tree pests in check, but outbreaks could become more common with warming ...

Parts of the North Cascades and Mount Baker are facing an outbreak of the western spruce budworm, aerial surveys reveal. The ...

Dozens of trees on a ridge above I-90 were cut or stripped. King County is now suing a trio of property owners.

King County is suing homeowners in Grand Ridge Park for allegedly cutting down more than 140 trees so they could have a better view of the mountains.

Every species of tree has unique characteristics, from its bark to its leaves, that you can use as clues to identify ...

A popular mountain bursting with rhododendrons and endangered species in Mitchell County will soon reopen, nearly eight ...

Now, researchers at the University of Texas at Arlington are using artificial intelligence to take the guesswork out of pollen tracking, starting with tree pollen.

Winds blasting at 100 mph during the storm "heavily impacted" the spruce fir forest atop the mountain, causing loss of tree canopy and hazardous conditions, according to the release.