Charles LaCalle, a resident of Santa Fe’s South Capitol neighborhood, labored hard hoping to rescue the fir tree in his front yard from an aggressive outbreak of the Douglas-fir tussock moth ...

An aggressive hatch of Douglas-fir tussock moth caterpillars is threatening trees, both in national forests and in Santa Fe.

The wretched worm that ravages spruce and fir trees and leaves a brownish mess in its wake seems to be everywhere one looks ...

The state’s park department says they are experiencing an outbreak of Douglas-fir tussock moth caterpillars at Hyde Memorial ...

Birch Creek Golf Course recently dealt with an infestation of Douglas-fir tussock moth larvae, which damaged several of the ...

Invasive insects that resemble tiny wasps are quietly spreading across the United States, threatening pine trees, and experts say Christmas tree farms could be next.

The protest, near Olympic National Park in Washington state, is part of a growing movement aimed at saving decades-old trees that aren’t considered old-growth.

CEDAR FALLS — The owner of a Cedar Falls tree company has been charged after he allegedly collected money for a job that was never completed. Cedar Falls police arrested Keith Martin Koehn, 50 ...

It's unusual for an outbreak from the insect to be found in Western Washington, state officials said.

Pine trees are one of the most common coniferous species in North America. Learn how to identify the types found in the United States and Canada.