From Wikipedia: Blue Wildebeest are also known as Gnu (of Khoi origin) They stand about 1.4 m at the shoulder and weigh up to 250 kg. Wildebeest migrate seasonally during May in large herds from the grassy plains to the woodlands of Africa. When they stampede they can travel at 80 kph and can be very destructive. They are hunted for food by predators such as lion and leopard.