The population is growing. It sounds like Wisconsin's forests are pretty healthy. I've noticed lots of dead white birch trees. Most trees lose their leaves each fall, but some keep them over winter. Wisconsin's total land area is 34.7 million acres.
Most forested land is in the northern part of the state.
Many southern Wisconsin forests were cleared for agriculture by the late 1800s. Forests in the north were heavily cut for timber by the early 1900s. Therefore, almost all the mature trees you see today are less than 125 years old. Thousands of acres of pines were planted across the state in the 1930s by the Civilian Conservation Corps. Deforestation is a big concern.