Try to represent now a special marking on the circle, choosing the Pen Tool and the command Make Selection. Then paint this part with the usual instrument (Gradient Tool).

Eagle designing

Represent on the circle now a visible flare, selecting the Brush Tool with smooth edges:

Eagle designing

Then make the corrections on its brightness and contrast, using the next options: Image ? Adjustments ? Levels (ctrl+l).
  


Eagle designing

Continue with the Blending Options window and set the next adjustments in it:

Eagle designing

That is what we've got:

Eagle designing

Select now again the Pen Tool and Fill Path command to represent a stylish eagle around this circle:

Eagle designing