Eastern towhees occur in many habitats, from tallgrass prairies and marshes to mature forests. Tallgrass prairies are tall grasslands in areas of higher rainfall. Natural features in the monument include forests, tallgrass prairies, wetlands and rivers. Tallgrass Prairie Preserve is north of Pawhuska. This preserve contains about of tallgrass prairie, aspen parkland, and wetlands. The ecoregion is encompassed by the tallgrass and shortgrass prairies. The Mixed Grass prairie was recognized as a mixture of the tallgrass and shortgrass prairies. The tallgrass prairie is an ecosystem native to central North America. The preserve protects a nationally significant example of the once vast tallgrass prairie ecosystem. Tallgrass prairie is capable of supporting significant biodiversity. The Tallgrass Prairie Preserve is north of the town. About of the national monument has been restored to native tallgrass prairie. The park covers , including 80 of recreated Illinois tallgrass prairie. The park considers the native tallgrass prairie remnants to be its most important natural feature. Over 95% of the original tallgrass prairie is now farmland.