Yellow-backed duiker
These forest dwelling antelope feed selectively on plants or plant parts such as shoots, roots, leaves, and buds, but their diet is mainly made up of fruits. The yellow-backed duiker is more efficient at digesting poor quality food than most other duiker species. This allows them to eat large, low quality fruits. Their diet makes them very hard to keep in captivity as most domesticated fruits are not well suited to their low fiber requirements. They are considered concentrate selectors, meaning they eat "diets relatively low in fiber, have a well developed ability to forage selectively, a rumen bypass, a rapid passage and high fermentation rate for starch, and they frequently encounter toxins."
Atakapa
The Atapakan ate shellfish and fish. The women gathered bird eggs, the American lotus ("Nelumbo lutea") for its roots and seeds, as well as other wild plants. The men hunted deer, bear, and bison, which provided meat, fat, and hides. The women cultivated varieties of maize. They processed the meats, bones and skins to prepare food for storage, as well as to make clothing, tent covers, tools, sewing materials, arrow cases, bridles and rigging for horses, and other necessary items for their survival.