Many species of primatesPrimates are fur-covered mammals living in a variety of environments on most continents, including Africa and South America. Long ago, the primate population was larger, but the loss of their natural habitat has reduced their numbers. The primate species includes simians and prosimians which have different physical characteristics and lifestyles. Most wild primates live in jungles or forested areas near lush vegetation like shrubs, grass, and trees. This animal variety is generally vegetarian, but scientists have occasionally observed some primate species consuming meat like insects. There are several varieties of wild primate species living in areas far from humans. Mountain Gorillas Small primates often climb trees to find foods such as nuts, berries and seeds. There are species of primates, including gibbons, which rarely touch the ground but move from tree to tree with their long arms while holding on to the branches. Mountain gorillas often weigh hundreds of pounds and are unable to climb trees. This species will instead look for food that falls from trees or grows on shrubs. Many primates have the ability to stand on their hind legs to forage in trees or walk for extended periods of time. Several species alternate between walking on four or two limbs. Types of Social Groups Primates vary in size, from tiny lemurs as small as a mouse to gorillas weighing more than 400 pounds. Many types of primate species travel in groups or packs with a large adult male, several smaller females, and young of different ages. Males and females may have different color variations, tooth sizes, and other characteristics to distinguish the sexes. Primates tend to have large brains, making them a medium for other primates to run for cover. Most wild primate species live in tropical rainforests on different continents. Many primates often hide in the treetops, but several species live on the ground. Protecting primates from extinction Loss of natural habitat, disease and capture have reduced the numbers of many primate species. Hunters captured large numbers of chimpanzees, gorillas and orangutans for circuses and zoos. Many hunters kill primates to use their fur, body parts, or meat. Unfortunately, many health problems, such as measles, can also be transmitted to several species of primates. Because primates have no natural immunity, vaccinations, or medical treatment, many social groups are dying. Today, there are groups of people who protect primates by providing animal sanctuaries while fighting for laws against killing the animals..