Skip to main content

Trees

close up photo of insect hole on tree

Cantankerous cavities

Most cavities in a tree are caused by some type of living organism, either an animal or a pathogen of some sort. Some cavities will only be found in dead trees or a portion of a live tree with dead wood. Other cavities can be in otherwise completely healthy trees. Let’s take a look at some of the...
Finish this story
brilliant red fall color of Eastern Wahoo shrub

Nature's Technicolor Dreamcoat: The science of fall color

You feel it, don't you? Sunrise coming later, sunset earlier, and the roller rink of acorns underfoot. The change of seasons is well underway. And just as you are pulling out your flannel shirts, wool socks, and warm gloves the trees and shrubs are also pulling out their fall wardrobe. The...
Finish this story
Upper branches of white oak tree

Species Profile: White Oak

The mighty white oak tree, Quercus alba, has long been the subject of folklore and legend. Sometimes called the “King of Trees,” the oak is often associated with titans in the pagan pantheon, Zeus and Thor to name just two. In Illinois, we recognize its importance and have named...
Finish this story