I discovered that the challenge is about using the pen tool, so I gave it a try, normally I use sktchy tool with on fall off on max, if I want to do just lines.
The wonderful ref is from sktchy, I struggled with the beak.
I am tempted to add forever more detail but I know that will ruin it.
For the ardent observer, I did not do an exact copy. Like with the feet, in the photo you cannot see both feet, I made them more visible, and I changed the composition a bit. I live that you can so easily select and transfer in sketchclub, it my way of working, not having a plan up front but adjusting all the time.
I added some random little random lines around the bird to show the energy.

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110,677 glops
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Created with an iPad Air
Uploaded 2017-10-01 11:39:31.252010
Featured by Charmayos
Tagged ipad
This sketch is in 3 groups
A home group
Birds
Painters Group
Challenge: Pen only

Sketch stats

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