Giraffe battle filmed for new David Attenborough series Julian Fennessy, a biologist at the Giraffe Conservation Foundation and Director of the Namibia Nature Foundation, said: "Their necks are extremely powerful weapons. It is usually held at a 45 degree angle, but if you bend it and swing it back, it is like an elastic band and the forces created are very large. The wacks produced when they make contact can probably be heard up to a kilometre away. Giraffes practice for these fights for most of their lives, but normally they back off before a fight occurs. The tactics in this fight are amazing - it shows how much practice has led up to it. Martyn Colbeck, who filmed the fight, said he spent a month following giraffes around before he witnessed a fight. He added: "The giraffe that challenged the main bull came out of nowhere. Then it was over so quickly. We just sat around afterwards stunned before replaying the footage over and over to look at the tactics they used. They were obviously very experienced fighters and had their own unique strategy. The defeated giraffe, although knocked out, got up about three minutes later and retreated.