Smaller antelopes such as the common duiker are a common prey in the southern Kalahari. Above the timberline, the Kilimanjaro tree hyrax, the grey duiker, and rodents are frequently encountered. The most significantly preferred species are ungulates; impala, bushbuck, common duiker and chital. Some of the common predators of the red duiker include eagles, pythons, and leopards. However, the status of two species, Aders's duiker and zebra duiker, remained dubious. The scientific name of the zebra duiker is "Cephalophus zebra". However, the status of two species, the zebra duiker and the Aders' duiker, remained dubious. There are also large herbivores, such as bushbuck, common duiker, and klipspringer. The scientific name of the blue duiker is "Philantomba monticola". As many as 16 subspecies of the blue duiker have been proposed. The blue duiker can sustain itself on dead foliage better than other duiker species. The blue duiker bears a significant resemblance to Maxwell's duiker. These are names for different species of duiker. They are sometimes referred to as the banded duiker or striped-back duiker.