COEUR D'ALENE, Idaho -- If you want to impress your friends with your tree knowledge on your next hike, check out the upcoming class from UI Extension Forestry. On April 26, The UI Extension Forestry, ...

The Douglas fir, also called a Douglas tree, Oregon pine or Douglas spruce, can grow hundreds of feet high — and the oldest of the species can live for over 1,000 years. The Douglas fir was named ...

A cabin is surrounded by Douglas fir trees. Douglas firs are in a "decline spiral" in southwest Oregon, scientists say. Amid a years-long drought and insect infestation, Douglas fir have entered what ...

There is a group of evergreens whose members don’t fully fit the typical mold of conifers and must have been a brainteaser for the early botanists to name and classify. Case in point, the larch tree ...

Drought and insects have killed an unprecedented number of Oregon’s Douglas fir trees during in southwest Oregon and the ...

CORVALLIS, Ore. (KTVZ) – Increases in mortality among Douglas firs in the Klamath Mountains are the result of multiple factors that have the iconic tree in a “decline spiral” in parts of the region, a ...

The latest assessment of forest health in Colorado shows the Aspen area is experiencing a steady spread of infestation from Douglas fir beetles, but Pitkin County overall is faring much better than ...

The giant Doerner Fir tree caught fire Saturday in Coos County, Oregon. Firefighters are figuring out how to save the historic tree. A drone captures fire damage from above the Doerner Fir tree in ...

When it comes to choosing the right fast-growing tree for year-round privacy, the iconic Douglas-fir (Pseudotsuga menziesii) Christmas tree may not be the first thing that comes to mind. Its fresh ...

CORVALLIS, Ore. (KTVZ) – Douglas-fir trees will likely experience more stress from drier air as the climate changes than they will from less rain, computer modeling by Oregon State University ...

In coastal Oregon, the state's tallest fir tree is burning. Douglas-firs (Pseudotsuga menziesii) are Oregon's most common trees, but the tree that's ablaze, known as the Doerner Fir, is special.

A Douglas fir beetle outbreak has resulted in the loss of more than 1,000 trees on Mount Helena, and the city of Helena’s Open Lands Division is working this spring to address the outbreak that has ...