Males can weigh between , weighing on average . On average, males weigh from , with females weighing from . It can weigh up to , males being slightly bigger than females. Bulls can weigh up to and cows up to . It can weigh up to when loaded. Calves at birth weigh about and are about long. They weigh at birth and are able to swim. The statues weigh each and stand about tall. They can weigh from and stand from in height. Males weigh up to , and females up to . At birth, cubs weigh and measure in length. Adult males weigh about on average. The slightly smaller male may typically weigh from . Adults can weigh from , although most will weigh . One source states that adult females can weigh up to .