While Wisconsin is blessed with many natural areas, our wildlife still faces several threats over the long term.

　　First because our population is growing and our cities are spreading into the countryside, fewer natural wildlife habitat areas are left each year. Some wildlife species, such as deer, rabbits and chipmunks, are adaptable to many conditions, but other creatures have very specific plant, moisture and temperature requirements. These are the endangered species which we risk losing if we don't preserve enough amounts of habitat for their survival.

　　Next, because many types of plants and animals have specific habitat requirements, climate change could cause disastrous losses of wildlife species from Wisconsin. A one or two degree change in average annual temperature will translate into large changes in Wisconsin, affecting snow cover in the winter and excess heat in the summer. Plants and wildlife are sensitive to moisture changes, so they will be harmed by this dryness. Unfortunately, trees and plants can't simply pick up and move to a more hospitable location. Instead, they will die where they stand, exposing and starving the wildlife that depend on them. Drought tolerant plants and trees will gradually spread to replace them by seed, but this process takes time. In many parts of Wisconsin, natural habitat is chopped up and isolated in small islands.

　　In addition, over the past 150 years, many non­native plants, mollusks(软体动物), insects, fish, birds, mammals, and diseases have found their way to Wisconsin. These “aliens” are often aggressive competitors with native wildlife, especially after they've left their own natural environments and controls.

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