I liked this exercise a lot. It was interessting to see, that some things didnt look like I thought they would. I mean... for example antelopes hoofs could be as shiny as a horse hoof. But nobody takes care of them so they are actualy quite dull and dusty. I also didnt know the webbing betweens the ducks toes to be scaly.
But most important I realized, that painting a material-concept is not about making it perfect. You will proberly see the images were I started to rush myself in order to finish.
I am not entirely happy with the results and so I am looking forward to your feedback. Were did I well and were do I need to improve?