@monikozi My friend gave me the book by Andy Rouse who is very good in backlit wild life photography, his object does not lose details. My bird is too dark.
I would suggest getting comfortable with the camera exposure comp adjustment and map it so it is as easy to change as the shutter speed. It goes a long way to accomplish your vision when you can't control the light.(if you are using auto iso setting)
@teriyakih my shutter speed and aperture is fixed 3200 and 8 in the case because I have to accommodate the bird moving out of the focus point. The only thing I can changed here is the ISO, I was fooled by the bright surroundings,