Males and females look like different animals. Males are dark grey with horns; females are rusty brown with white stripes and no horns.

Antelopes of Africa · day 7 of 7
Females are rusty brown with stripes, and only males have horns.
Males weigh 98 to 125 kg, far more than females.
They leave the nyala's scent wherever it walks.
It gives a sharp, high bark like a dog's, mostly used by females.
The calf stays hidden for up to 18 days while its mother nurses it.
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