Also known as a Collared Peccary. javelinas migrated north into the southwestern United States during the last century. Although javelinas may superficially resemble wild boars and domestic pigs, these species of animals are not closely related. javelinas stand about 18 inches tall and are between 32 and 36 inches long. An average adult weighs 40 to 60 pounds. Their tiny hooves have four toes in front and three toes in back. Javelinas have an excellent sense of smell, average hearing, and poor eyesight. The basic social unit is the herd, which has an average of 12 individuals. Members of a herd mark their territory by rubbing their scent glands on rocks, shrubs and trees. Javelinas are active during the cooler parts of the day; in the summer, this means early morning and early evening. Chiefly vegetarian, javelinas feed on a variety of desert plants, cactus stems, pads and fruits, agave hearts, mesquite beans, jojoba nuts, roots and flowers. An occasional insect or bird egg may be added to the menu.