The Springbok's name is derived from its "pronking" display, which is the most spectacular form of stotting (high bounding) of any antelope. This sign of excitement is elicited by various stimuli, especially predators. In a complete performance, a Springbok makes stiff-legged jumps to heights of 10 feet with its head down, back bowed, and spinal crest fully erected. Springbok number in the tens of thousands in the Etosha National Park. Springbok have strongly ridged horns; bowed out with tips hooked inward like a stethoscope.