Abstract
The region of the Arab peninsula has a diversity of plants and animals. Grazing on natural rangeland plants may have a neutral, positive, or negative impact on both animals and plants as well depending on several factors. Grazing environmental forces includes herbivory, physical impact, and deposition. When animals graze on plants, they show a hierarchy that leads to understanding instinctive responses and behavioral activities. Mouth anatomy of goats gives them the merit of capability of selecting plants in the range, while that of sheep enables them to graze quite near the ground. Preference is a behavioral trait that includes the proportional selection of plant species from a group of two or more. Animal behavioral preference in governed by abundance of a plant species, its morphological features, the animal species in question and the variety of species available. Animals have two distinct acquired behaviors (i.e. evolutionary and field acquired). Forage quality and quantity were inversely proportional to the ratio of spent time to graze in group to the region taken in the landscape, to be concluded that wild plants affect grazing animals by modifying their behaviors to adapt the current situation in the range.