My desk is at the right of that window.
Usually, the blinds are halfway down so I have better contrast at my
monitor. The
bird-protecting WiCo in this case is a castle I dubbed Hogwarts, as the
study is the place where my Snape and Minerva fanarts are hanging as
well as certain film posters. My husband and me agreed keeping
anything visually "Harry Potter" strictly to the study ;o).
My WiCos are, sadly, much less detailed and refined than Shadowycat's
artwork, as I didn't use any additional tools using WiCo at the time
which enables to draw finer lines. Still, they do the trick and I can
see Snape at work every time I look out of the window *lol*.
Here are some pictures of the work in progress: (click on images for
larger view)

outlining in black
after the original
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dito with silver outline
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first part of the colouring
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finished after a second
layer in some places
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