The embryo is connected to the mother and receives nourishment and oxygen through the placenta. Young American jackals have soft, short, gray-brown fur. Their eyes open approximately ten to fourteen days, assisting them in locating their mother, and milk teeth emerge after the third week. The species has dense fur with an undercoat, and the color helps it conceal itself in grass and bushes; the fur becomes thicker in winter. Large, erect ears enable the animal to hear sounds from a great distance. Long, strong legs allow for fast running and jumping. The sharp sense of smell aids in finding prey and carrion. A bushy tail assists with balance and transmits signals to other coyotes. Adult American jackals possess strong teeth and fangs for seizing and tearing food.