This was something I did a while ago for my first animated short at college... a story involving a camel and a boy racer nomad, inspired by my memories of boy racer types in Jeddah - Saudi Arabia where I spent a few family holidays in my early teens.
The camel design started as an ordinary camel, but I filtered it via a diplodocus and I liked the results. The hump was meant to reflect the shape of the dunes behind him. I like adding elements of other animals to the ones I'm working with, it's sometimes the quickest route to interesting silhuettes, and rewarding when it works.
Chad was also inspired by Max... an ex-circus camel I knew bought by a local stable owner from my hometown of Chichester. Max was fantastic... he would run around his paddock freaking out the horses like the hunchback of Notre-Dame and groaning. He once gatecrashed a neighbour's garden party by craning his neck through the dividing hedge and chewing a small girl's hair down to a rough crew-cut before being pulled off by angry parents.
Regretably, as is often the way with things that stand out in a crowd, his watertrough got poisoned one night by local yobs and that was the last of him. I still miss having a camel down the road who I can draw and have groaning competitions with!