Male giraffes often engage in necking, which has been described as having various functions. One of these is combat. Battles can be fatal, but are more often less severe, generally ending when one giraffe surrenders to the other. The longer the neck, and the heavier the head at the end of the neck, the greater the force a giraffe is able to deliver in a blow. It has also been observed that males that are successful in necking have greater access to estrous females, so the length of the neck may be a product of sexual selection.
After a necking duel, a giraffe can land a powerful blow with his head — occasionally knocking a male opponent to the ground. These fights rarely last more than a few minutes or end in physical harm.
In the tradition of ‘Killer Whale vs Seal‘, ‘Lion vs Buffalo vs Crocodile‘, ‘Shark vs Octopus‘, ’Leopard vs Porcupine‘, ‘Hornets vs Honey bees‘, ’Salmon vs Grizzly Bear‘, ‘Hippopotamus vs Crocodile’ and ‘Polar Bear vs Walrus Colony’, here is Giraffe vs Giraffe: