A state’s insect expert called the discovery of a tree-killing bark beetle in a Bothell trap “concerning.” Washington state officials have been tracking the migration of the California ...

But researchers are growing more worried about bark beetles, which didn’t pose a serious threat in the past. The beetles are native to California and have co-existed with sequoias for thousands ...

California scientists discovered a new species of manzanita, believed to grow only in places along the state’s south-central coast. And unlike its sister shrubs, its bark is gray instead of red ...