I bought this new piece of ply-wood for $40 from the hardware store across town.
I cut it into a few pieces. Not at all evenly, really not sure what sort of math I was using.
They went from biggest to smallest. The small part I wasn’t sure what to do with,
so I left it in the bed of my truck. The medium looked good for a hawk. On that
I laid out the Zone-Tailed Hawk shared here previously. The final piece, larger seemed
fit for a great bird, while I considered an Osprey for a minute, I felt it a fine day to go from
Hawks to Eagles. The Bald Eagle seemed a good starting point.
Here it is in pencil gliding between wing beats.
farnco illustrations 
What type of pencil did you use?
Just your average #2. Dixon #2 HB. I haven’t found an artist pencil that seemed better than that, and they cost less.
I so wanted you to say carpenter pencil 😉