Giraffe
Giraffes use their feet to kick predators away, and mature male giraffes use their head and necks to fight for dominance at mating time. These long necks, are, in fact, used as a weapon during the male on male intra–sexual battle that is also referred to as a spar. The females, who receive little to no aid from their partners in raising the calves, prefer the males that are victorious. Those with the longer and stronger necks will reproduce more frequently and keep their genes in the giraffe population for longer compared to the males with shorter, weaker necks.