Dry grasslands have dry patches amidst them that are necessary for the survival of the blackbuck. The male bucks here are defending their individual piece of land, called the lek. The dark spots on the ground are basically a collection of their excreta. The females enter the colony, either in small groups or individually, and choose a male of their choice. When this happens, there is much tension in the area, which often results in aggressive sparring, a behaviour also known as lekking.