R.G. wrote:
If you lighten the light parts of the bird they will end up even closer to the background level of brightness, and it looks like the dark parts of the bird are already quite dark. Tweaking the background is about the only way forward. And I'm not sure how you could get the bird to stand out and at the same time not isolate it from the background, since it's the bird's similarity to the background that's the problem.