Awesome chestnuts! Wish i found interesting things on my walks.. probably just need to keep my eyes open..
The ostrich is real cool. Some very interesting edge handling going on, just be sure to always remember the skull and to make sure you dont leave your drawings skull-less. As it seems that the ostrich ends just behind the eyes, which may just be the camera angle, but adding a couple of feathers to hint that there is something there is always good
Thanks as always for dropping by my sketchbook