Much of South Dakota, not including the Black Hills, is dominated by a temperate grasslands biome. Although grasses and crops cover most of this region, deciduous trees such as cottonwoods, elms, and willows are common near rivers and in shelter belts. Mammals in this area include bison, deer, pronghorn, coyotes, and prairie dogs. The state bird, the ring-necked pheasant, has adapted particularly well to the area after being introduced from China, and growing populations of bald eagles are spread throughout the state, especially near the Missouri River. Rivers and lakes of the grasslands support populations of walleye, carp, pike, and bass, along with other species.[21] The Missouri River also contains the pre-historic paddlefish.

Because of higher elevation and precipitation, the ecology of the Black Hills differs significantly from that of the plains. The mountains are thickly blanketed by various types of pine, mostly of the ponderosa and spruce varieties. Black Hills mammals include mule deer, elk (wapiti), bighorn sheep, mountain goats, and mountain lions, while the streams and lakes contain several species of trout

Luciano Mende

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