Addax Extinction: The Endangered Antelopes July 11, 2016 by Chan_Beran Both males and females addax have long spiral horns and stand 37 to 45 inches (95 to 115 centimeters) at the shoulder. But these herds can have five to 20 members which is led by a dominant male. Pages: 1 2 3 4 5 6 7