Hi there,
A little late to the party, but I really wanted to join the contest. Unfortunately I only had an hour to make a sketch of the Ibex profile (actually 3/4 view since I feel it makes the illustration/logo a bit more dramatic). I can further develop the Ibex in a more finished look as well as add a straight facing version in the next phase.
I was not sure what if any features distinguishes a hybrid Ibex from other species. I looked at several Nubian and Persian hybrid, but outside of maybe straighter horns and smaller ears, there was not much in terms of physical features that separates one from the other. I'm guessing there is more to it than I can see. :)
Please feel free to leave feedback and suggested changes. Also you can visit my profile/portfolio page to see if there is another direction you may want me to try,
Cheers!
Marcelo