Once abundant, blackbuck antelope are very rare outside game preserves in India. Hunting for meat and trophies as well as habitat destruction has severely reduced the numbers of wild blackbuck.
One of the few antelope which exhibits pronounced sexual dimorphism, males and females are readily distinguishable. Only males have ridged, spiral horns which can grown up to 29” or more. All young are born tan but males gradually darken to deep brown or black with age. Females remain a light tan with white markings and bellies.
Dominant males command a territory of 3-40 acres that includes a harem of females and young.
Blackbuck at Fossil Rim can be seen running wayward females back to the harem and keeping other males away. During breeding season males defend these areas tirelessly in order to keep the largest group of females within it for the longest period of time. This is primarily achieved with posturing and threatening gestures but fighting with the sharp horns does occur.  

Blackbuck

Antilope cervicapra