Nyala [Nyala angasii of Tragelaphus angasii]
Nyala rams measure about 1.05 m at the shoulder with a weight of 92 to 126 kg. Ewes are much smaller in size, measuring 900 mm at the shoulder with a mass of 55 to 68 kg. Rams have a striking, charcoal-grey to brownish, shaggy coat, marked with white stripes vertically running down their bodies, are spotted on their flanks, and have white chevron-shaped faces.
Only the rams have horns, which measure about 650 mm in length and curving inward.
Along their underparts, from behind the chin to between the hind legs, runs a ridge of long hairs. From their heads, along the spine to the rump, they have dense, black manes. Ewes are chestnut-brown in colour and have stripes on their flanks even more prominent to those of the ram.
This species is both a grazer and a browser. It will readily eat flowers, fruits and leaves – a variety that plays a role in securing its survival.
Interestingly, juvenile rams have the appearance of ewes. It is suggested that this disguise protects young rams from jealous dominant bulls, allowing young rams to grow up safely under the protection of the herd.
After a gestation period of 220 days, a single calf with a weight of 5 kg is born. Twins, although, are not uncommon. They have no specific breeding period, but peaks occur in the months of autumn and spring. The average interim between births is about 297 days. Ewes are sexually mature between 14 and 18 months. Rams navigate their mating opportunities through dominant behaviour.
This is a non-territorial species. The home ranges of both sexes overlap, the ranges of ewes being double the size of rams’. They prefer dense woodlands and thickets close to permanent water sources as their habitat. Nyalas are very elusive animals and are more likely to be spotted at night.
Where They Are Found
Nyalas are found in many game reserves and private farms throughout South Africa as a result of translocation, many living in the Kruger National Park.
Male spoors can be distinguished from females’ as their forefeet are slightly wider.