"Dik-dik" and "Oryx" are both types of which animal?

Dik-dik and oryx are both species of antelopes.

Dik-diks are tiny antelopes native to the grasslands of eastern and southern Africa. They grow up to be only 30-40 cm (12-16 in) tall, and weight 6 kg (13 lbs) at most. Due to their small size, they are hunted by many predators, including big cats, jackals, monitor lizards, hyenas, wild dogs, pythons, birds of prey, and humans. They were named after the shrill alarm call they make through their nostrils when in danger, to alert other dik-diks of nearby danger.

Oryxes, on the contrary, are a quite large species of antelopes. Their bodies can grow up to 90 centimeters in height and 2.1 m (6'10") in length. Oryxes have a lifespan of about 20 years. They travel the African steppes and deserts in groups of up to 600, but the size of their herd depends on the local availability of food. Oryxes have a unique circulation system in their head; they are able to cool the blood flowing to their brain through the capillaries in their nose as they breathe, making the hot African weather much more bearable.