Dik-dik
The tiny antelope of African thornbush — one of the world's smallest antelopes, barely 35–45 cm at the shoulder, with enormous dark eyes, an elongated flexible snout, and a habit of zigzagging away in a characteristic stop-start dash when alarmed; dik-diks form lifelong monogamous pairs that maintain small territories together, marking boundaries with secretions from preorbital glands beside their eyes.