The pine bark beetle, a destroyer of Colorado’s forests, may also be a pesky polluter that adds to the state’s ozone problems. Every time a beetle bores into a tree’s bark, it releases sap ...

CHEYENNE -- Whitebark pine trees in the Yellowstone area are dying at a rate approaching the acreage of all trees that burned in the region's vast 1988 wildfires, a researcher ...

This can prevent introducing invasive species such as the pine sawyer beetles to the area. He also advised people to contact professionals if they come across invasive species in the wild.

While the beetles don't seek out people, they can bite, Taylor Scarr said. "Their natural response to being grabbed is that they think it's a bird that's after them — a bird predator," he said.

Sometimes it's normal for needles to turn brown and drop, and other times, it can be a sign of disease.

GRANTS PASS, Ore. -- The latest mountain pine beetle infestation appears to be slowing down in Eastern Oregon, but not before becoming the leading killer of the signature tree of Crater Lake National ...

Park and Forestry Superintendent Sonny Almeida has received at least a half-dozen calls recently from city residents claiming they have found the notorious longhorned Asian beetle in their yards ...

Pine sawyer beetles that carry the pine wilt leave about an eighth-of-an-inch-diameter hole in the trunk. Holes any smaller are from a bark beetle and are not necessarily a sign of the disease.

Instead, it hitches a ride on pine sawyer beetles—substantial, finger-sized insects with long antennae and sharp mandibles. The nematodes hide inside the breathing tubes that carry oxygen around ...

Park and Forestry Superintendent Sonny Almeida has received at least a half-dozen calls recently from city residents claiming they have found the notorious longhorned Asian beetle in their yards ...