3D wildlife drawings

im working on makeing my eyes on birds or other wildlife and nature drawings more realistic and working on drawing them in 3D by how i place shapes.  overlaping circles, shadows across eyes, face, body and anywhere else and by doing things like reflections and shadows and more shadeing. cause i usualy prefer drawing from  my memory rather than copying and traceing im doing it by looking at my drawing from different angles and looking at the details in my drawings to see what i can improve to make it look more realistic and find ways to by looking at the shapes or where they are where could be lighter or derker and various other things so i thought id do a wildlife 3D drawings post so people can see my realistic and 3D ones and not just the eyes im doing but everything else and  people can see my  progress of my drawings aswell I hope you enjoy them