Which region is NOT noted for its biodiversity in the United States?

The Great Plains region is often characterized by its relatively uniform landscape dominated by grasses, which supports a different type of ecology compared to other regions that are rich in biodiversity. While it does have its own unique species and ecosystems, the overall diversity of biological life—such as a variety of plant species, insects, birds, and mammals—is generally lower than in biologically rich areas like the Florida Everglades, the California coastal region, and the forests of the Pacific Northwest.

In contrast, the Florida Everglades is known for its complex wetlands that support a wide variety of species, including many that are endangered. The California coastal region is famous for its coastlines, mountain ranges, and a multitude of microclimates that host unique flora and fauna. The forests of the Pacific Northwest are known for their towering trees and diverse ecosystems, including a variety of mammals, birds, fungi, and plants that thrive in the moist, temperate climate. Thus, when considering overall biodiversity, the Great Plains stands out as the region with comparatively less biological diversity.