Before the advent of pumpkin spice lattes and Halloween decorations, the most reliable indication of autumn’s arrival lay in the tree canopy as its greens gave way to yellows and reds and its leaves ...

The birch trees in this photo appear to have been infested with bronze birch borer, as indicated by the dead upper branches where larvae have disrupted the flow of water and nutrients.

Unless you are intent on making your own maple syrup, you probably haven't given tree sap much thought. So, let's take a deeper dive into a tree's 'blood' or sap and the normal flow in the fall for ...

Fall is in full swing across the United States, and leaf peepers—people heading out to take in the scenic foliage—are out in force. New England is famed for its red and gold treetop hues at this time ...

Under a canopy of fiery orange and red, Amey Bailey is taking a hike she knows well. It’s the second week of October, and maples and beech trees are showing off their colors. Every few steps, a piece ...

It's officially fall in the Northern Hemisphere, which means bright, beautiful foliage isn't far behind. Parts of the U.S. will soon start to see — if they haven't already — leaves and shrubs trade ...

Q: Can you help me figure out what’s likely going on with this river birch tree? The tree has been dropping leaves incessantly since about April/May, hundreds per day. Should this tree be dropping its ...

Andrew Richardson, an ecologist at Northern Arizona University, maintains a camera at Hart Prairie, about 8,000 feet above sea level on the west side of the San Francisco Peaks near Flagstaff. While ...

With September finally here, the yellow, orange and red hues of fall foliage will soon make an appearance, signalling the coming of the autumn and trees preserving their energy each year. Fall foliage ...

Fall foliage can be experienced across much of the United States in various ways and at different locations. While New England maintains an autumn stronghold, other parts of the country offer equally ...