The traits typically used to describe trees—leaves, twigs, and buds—are often hard to see or seasonally absent. Join Michael for an exploration of bark, which is always visible, in any season. As you hone your perceptive abilities you will learn about a system for identifying tree species by their bark, and discover why such a variety of bark characteristics exist. Why do some species have smooth bark, while on others it is thick and broken? Why does bark peel?