These animals are considered to be the most beautiful antelopes. Males have long, spiral horns and occasionally females will grow small ones. Lesser kudus can be distinguished from greater kudus by the number of stripes on their back, their size and the lack of a beard on the males. Lesser kudus have between 11 and 15 vertical white stripes, while greater kudus have between six and 10. Females tend to form small groups with their offspring and males only join the females during mating season. Young kudus are red and males will turn grey when they reach between one and half and two years old. When alarmed these antelopes take abrupt flight with soaring bounds while emitting loud, hoarse barks to warn others of the danger.