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."
Antelope squirrel
Antelope squirrels are commonly found in dry, shrubby areas of the southern United States into Mexico. These areas are sandy with rocky areas that provide soil that can be burrowed into for shelter and to escape the heat of the day. The temperatures in these regions can exceed during the day and require special adaptations by the ground squirrels to survive. During the night, temperatures in these desert and dry areas may dip below freezing which again requires adaptations to survive. There is very limited free-standing water supply. These regions can experience long bouts of drought. "A. harrisii" does not require surface water within its range but will drink on occasion from basins and bird-baths.