Interesting! I came accross a giraffe whose head and neck was covered in 'lumps'! could someone shed some light on what this could be please?
I saw these pictures posted a while back and found it very interesting. I did some research as to why this happens. All I could find was that this is a unique feature Giraffe have, the ability of laying down bony material around the skull. This is mainly done by bulls and increases the weight of the skull as much as 3 times that of a female. This can with time cause them to be covered with bony lumps. These bony growths often grow on one side of the skull, so I think this guy could have let this get out of hand or these are some other growths.
While I was doing all this research I found some very interesting information which I thought I would share.
The coat pattern on each giraffe is unique, the same as a zebra's stripes are unique to each individual. Like a fingerprint.
I have always been amazed at the way a giraffe drinks water.
It goes down with its head to ground level or water level and suddenly pulls up its head with a spray of water flying out in front of it.
I am sure some of you have seen this. I always wondered about the blood flow to the head and back from the head when it did this.
The heart has to pump blood to the brain when the giraffe is standing and that is about 2.5m up and when the giraffe drinks water the heart has to pump blood down to the head which is also about 2.5m. What's really amazing is that when it drops its head to drink, the blood pressure stays constant in the head and when it pulls its head up from drinking, the blood pressure still remains constant. This is because it has valves on the jugular veins that stop the blood from rushing back and forth. I call them non-return valves. The valves close when the giraffe drops its head and to compensate for the pressure, the blood vessels are very elastic, so they stretch to compensate for the huge pressure, otherwise the blood vessels would burst. The same happens when it lifts its head.
There is a lot more info HERE
Jose also supplied some interesting links earlier in a different thread, I found this one