2. High/Low depiction with the pentool (Ostrich)

hmmmm. where and how am I supposed to start?

ok, let's begin with the outline...

whooa! done! 

defining the head, eye and beak...

begin grouping the highlight and shade area... 

actually it's more like a guessing game from then on.

more and more...

work-in-progress)))

body feather part is to be highly-depicted

head as well.

whereas leaving the neck and leg low-depiction 

Ta-da! yeah, here's the final Ostrich!