Sculptors are builders: We construct things and must get to the business of building by understanding armature, structure, bones and joints - not only where they attach but where they articulate.
Shown below is a two hour block-in of a Screech Owl modeled at a recent demo. See post #254.
The image on the right shows the model turned slightly to reveal the pipe support. Note, the pipe flange has been attached to a wooden wedge which creates an angle . . . allowing more freedom to work under the sculpture.