Bovid lifespans are highly variable. Some domesticated species have an average lifespan of 10 years with males living up to 28 years and females living up to 22 years. For example, domesticated goats can live up to 17 years but have an average lifespan of 12 years. Most wild bovids live between 10 and 15 years, with larger species tending to live longer. For instance, American bison can live for up to 25 years and gaur up to 30 years. In polygynous species, males often have a shorter lifespan than females. This is likely due to male-male competition and the solitary nature of sexually-dimorphic males resulting in increased vulnerability to predation.