Hi,
if you have graphic tablet/pen, this would be easy, if not, you'll use freeform pen
(from Photoshop tools).
But first you have to prepare brush, use appropriate size (for the "wings") and go to
brushes palette, decide on Hardness and Spacing, also click on Shape Dymanics > Size
Jitter > Control : Fade ( this "fade is important, but everything will be clear as brushes
preview will show changes in real time).
Make sure that first color in color swathes is the one you want for "wings".
Now open new empty layer above background image and either start drawing wings by hand,
or use freeform pen ( when you click on freeform pen, make sure that in the horizontal
toolbar "paths" are activated, not "shape layers" )
After you finish with your paths wings, go to Paths palette, right mouse click and choose
stroke path > brush. Photoshop will stroke the wing lines for you, depending on how you
prepared brush ( like described above).After couple of tries and errors, you'll certainly
get what you want.
You will add glare on the wings afterward, as well as mask out part of "wings" where you
dont need it.
If you are beginner in Photoshop, this might sound complicated, but apart from making this
"manually" ( I would do this in one stroke with graphic pen), I'm afraid there is no other
way.
Hope this helps.